In-depth baby product reviews led by a Pediatrician

Best Crib Mattress

We consider a quality crib mattress to be a worthwhile investment. We put the top 7 crib mattresses through a detailed side-by-side evaluation to find the best.
Credit: herjua © 123rf.com
Tuesday June 29, 2021
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Do you need a great crib mattress? We researched over 20 potential contenders, settling on 7 top picks to help you find the best crib mattress for your baby. Considering that babies spend most of their first years sleeping, a quality mattress is worth serious consideration and investment. Our picks focus on quality materials, mattress firmness, and longevity. The lowest-priced mattresses didn't make the cut as we consider a crib mattress to be one product worth investing in quality. Our guide can help you choose the right one for your baby.

Buy the Best Crib Mattress Within Your Budget
You get what you pay for when it comes to mattresses, and your baby will appreciate it if you spend the most your budget allows. While there are bargains to be had in baby gear, we believe that buying a crib mattress is not the time to look for savings by purchasing a low-quality mattress. However, we understand that some budgets are tight, and we've made every effort to include budget-friendly choices that avoid off-gassing and potentially toxic materials.


1

Best Overall Crib Mattress


Naturepedic Organic Cotton Classic 150 Seamless 2-Stage


Weight: 20 lbs | Dimensions: 51.63" L x 27.25" W x 6" H
Great dual firmness
Healthier materials
Waterproof & dust resistant cover
Heavy
Expensive

Hands-down, our favorite baby crib is the Naturepedic Organic Cotton Classic 150 Seamless 2-Stage. Its sturdy construction feels built to last with appropriate firmness and superior edge support for safe sleep. The 2-stage option provides a firm infant side and a toddler side with slightly more give. The materials are top-notch (i.e., GOTS certified organic cotton and heavy-duty 150-coil steel innerspring), making it potentially a better selection for those with allergies or asthma. There is no polyurethane foam in any Naturepedic mattress, and they don't use flame retardants in any product. This mattress has no chemical odor and is GreenGuard Gold Certified. Its food-grade polyethylene cover is waterproof and seamless, which makes cleaning easy, protects the interior from dust mites, and reduces the potential for microbial growth.

Keep in mind that this Naturepedic is the heaviest of our favorites at 20 lbs. Because of its innerspring construction, it requires some muscle to conduct bedding changes. If you are looking for a non-waterproof cover, this one is not the right choice for you as it uses food-grade polyethylene for waterproofing. Last, while this mattress's measurements are within the standard size, its corners are square, so it may not fit well in every crib. The crib mattress plus crib combination can be a "chicken and egg" dilemma, so our advice is to purchase from a retailer with a generous return policy (like Amazon) if the products don't combine the way they should for safety. Naturepedic has excellent customer service and a warranty for the original purchaser.

2

Best Lightweight Crib Mattress


Naturepedic Organic Crib Mattress - Dual Firmness


Weight: 10 lbs | Dimensions: 52" L x 27.75" W x 6" H
Dual firmness
Healthier materials
Lighter weight
Potential sagging
Price

If the traditional coil mattress is just too heavy a burden given the random and regular occurrence of nighttime sheet changes, then the Naturepedic Organic Crib Mattress - Dual Firmness might make life somewhat easier. This lighter-weight mattress uses what Naturepedic calls "food-grade polyethylene waves" to make up most of the inner mattress core instead of steel coils. The inner workings look like condensed batting in a wave-type structure, similar to the wave inside the middle of dense cardboard, providing support. It also includes the use of organic cotton and a waterproof surface to help keep things clean. It is made in the USA, GreenGuard Gold Certified, and Naturepedic is known for its excellent customer service and warranty. This mattress is dual-sided for infants and toddlers, and it has waterproof seams to keep things clean and free from mites, liquids, and microbes.

The "wave structure" of this Naturepedic mattress takes the place of...
The "wave structure" of this Naturepedic mattress takes the place of heavier coils that can make changing sheets a chore.
Credit: Abriah Wofford

When this mattress style first launched, there were reports of the center sagging relatively fast. When we spoke with Naturepedic, they assured us that the mattress's design and content had been redesigned and that the new version is less susceptible to sagging. We purchased the mattress and used a 30 lb weight in the center for several months to see if we could force the mattress to sag. In our tests, we didn't see any sagging or indentation in the mattress at all, even though the weight did move and logically should have left some kind of impression. Overall, we like this lighter mattress and think it is a great choice for families concerned with off-gassing or using natural materials closer to their baby.

3

Best Natural Material Crib Mattress


My Green Mattress Emily Natural


Weight: 15 lbs | Dimensions: 52" L x 27.5" W x 6" H
Great quality at a value
Firm & comfortable
Beneficial wool properties
Not waterproof
Potential wool odor
Not dual firmness

The Emily Natural by My Green Mattress is an excellent option if you want to avoid synthetic materials. Unlike the Naturepedic brand, My Green Mattress produces ONE crib mattress. The Emily has a soft quilted cover that uses GOTS Certified organic cotton with Oeko-Tex Certified natural wool underneath. We like wool as it regulates temperature, aids in flame resistance, is naturally resistant to dust mites and mold, and includes some water-resistant properties. The internal structure combines 150 13.5-gauge innerspring coils, all-natural coconut coir (GOTS certified organic coconut), and GOLS certified natural latex with heavyweight organic cotton batting. Even though the Emily mattress uses innerspring, it is 5 lbs lighter than the Naturepedic Organic Cotton Classic 150 Seamless 2-Stage, making it a good choice for anyone who needs something lighter without resorting to synthetic materials. The Emily Natural is also GreenGuard Gold Certified and has great customer service.

When you open this mattress, there is a noticeable natural wool odor, which can be particularly strong in humid climates. According to My Green Mattress, the smell results from natural wool. The company changed its wool supplier in December 2016 to attempt to remedy the issue. The new all-natural wool is washed in a GOTS-compliant organic detergent to help decrease the natural smell. While non-toxic, if you still detect an odor, My Green Mattress suggests hanging the mattress uncovered in the sun for 1 to 2 days to help neutralize any odors. The Emily Natural has no integrated waterproofing, so we recommend using a waterproof pad like the Naturepedic Organic Waterproof Fitted Crib Pad to keep your mattress clean.

4

Best Bang for the Buck


Babyletto Pure Core with Dry Waterproof Cover


Weight: 9 lbs | Dimensions: 52" L x 27.875" W x 5.5" H
Very lightweight
Waterproof
Dual firmness
Not natural materials

The Babyletto Pure Core with Dry Waterproof Cover utilizes a recyclable polyethylene mattress core that exceeds flammability standards using 80% modacrylic and 20% polyester fiber batting instead of chemical flame retardants. It is a good choice for those with allergies and asthma, and purchasers comment on zero odor and nice dual firmness (the firmer infant side is the one with the Babyletto tag). The Dry Cover has a polyester outer and an inner cotton lining that is waterproof and easily wipeable for clean-up; it is washable and feels soft. The Pure Core mattress can come with either the Babyletto Smart Cover, which is water-repellant/moisture-wicking, and Oeko-Tex certified, or the Babyletto Hybrid Waterproof Cover which has a waterproof inner and organic cotton outer layer. Depending on the cover you choose, we recommend purchasing a second replacement cover for easy wash rotation. Trust us. You'll need it.

Foam Mattresses May Not Work With Movement Monitor Based Sensor Pads
Because movement sensor pads rely on vibration feedback from the mattress to determine if the baby is moving/breathing regularly, a foam mattress is often incompatible as it can reduce movement, so the sensor pad doesn't "sense" it. You need to avoid foam mattresses or contact the monitor manufacturer to determine compatibility. While the Babyletto and other densified materials aren't "foam" mattresses, they may have similar properties that make them less compatible with movement pad monitors.

5

Potential for Tight Organic Budgets


Wonder Dream Baby Crib Mattress


Weight: 12 lbs | Dimensions: 52" L x 28" W x 5" H
Lightweight
Dual firmness
No polyurethane foam
Organic cotton cover
Not all natural

If you want lightweight, some organic materials, no off-gassing and don't have a lot to spend, then the Wonder Buggy Wonder Dream Baby Crib Mattress could be the solution to your search. This mattress is made in the USA, comes with a machine washable, water repellent cover, and doesn't off-gas. We like that this mattress has an organic cotton cover, and the entire thing is GreenGuard Gold Certified. The Wonder Dream core is densified polyester, which doesn't off-gas like polyurethane and is better for the environment. We experienced no smell in the mattress we purchased and no sagging during testing.

The Wonder Dream comes with an organic cotton cover that is...
The Wonder Dream comes with an organic cotton cover that is water-repellant. You can also remove it and toss it into the washing machine.
Credit: Abriah Wofford

If you want all-natural materials, this isn't the mattress for you as polyester is human-made. However, the cover is organic cotton, and that is what your little one will be the closest to while sleeping. While this option may not be the right choice for everyone, we love that they bring a safer product to the market for little ones and the environment without a hefty weight or price.

6

Good Lightweight Mattress with Cool Cover


Lullaby Earth Breeze 2-Stage


Weight: < 10 lbs | Dimensions: 51.63" L x 27.25" W x 6" H
Lightweight
Dual firmness
Washable, waterproof cover
Waterproof mattress
Breathable marketing

The Lullaby Earth Breeze 2-Stage mattress ticks all the boxes. The mattress core (59% polyester fiber / 41% polyethylene foam) is springless yet firm with strong edge support. It includes 2-sides with a firmer option for infancy and a softer toddler side. There are no flame retardants in Lullaby's products, and the Breeze is GreenGuard Gold Certified for low VOC emissions. Upon opening, there is no offensive smell to the mattress, and we appreciate that the mattress and cover are waterproof as little ones have accidents. The cover is a food-grade polyethylene with seamless stitching that cleans easily with a wet cloth and protects the core from dust mites, moisture, and microbial growth. The removable, washable polyester cover has a polyethylene waterproof backing and fits the mattress like a crib sheet for easy changes. The cover also has what Lullaby refers to as a 3D honeycomb, which supposedly creates a "cushion of air underneath the baby" to help regulate the bedding temperature. At under 10 lbs, crib sheet changes are easier and might be suitable for petite moms. Because the mattress cover is removable and washable, we recommend having an extra Lullaby Earth Breeze Washable Mattress Pad available for rotation through the wash.

Be aware that even though Lullaby Earth markets the Breeze Mattress Cover as "breathable," that this marketing should not be interpreted as a safe invitation to place your baby on their stomach to sleep. All babies should sleep on their backs on a firm surface for every sleep. We go into further detail on this topic in the Newton Wovenaire review, where, in our opinion, the "breathability" marketing is a bit excessive. We think the Lullaby Earth Breeze is a quality, lightweight crib mattress. With a washable, waterproof cover and a design that makes changing "a breeze," it is a good choice for many families.

7

Best Washable Mattress


Newton Wovenaire


Weight: 11 lbs | Dimensions: 52" L x 28" W x 5.5" H
Washable core & cover
Lightweight
Hypoallergenic
Expensive
Rough cover & not waterproof
Breathable marketing

The Newton Wovenaire is a synthetic, springless, foamless mattress that utilizes recyclable food-grade polyethylene polymer in the mattress core. Newton differentiates the Wovenaire from similar synthetic competitors with its core's unique fabrication and washability. It's pretty cool how they manipulate polyethylene into something that resembles a block of dried ramen noodles. Newton claims that 90% of the mattress core is air. Now that's innovative! The Wovenaire is a great choice for those with a history of asthma and allergies, as the core and cover are completely washable (in the shower) and resistant to mites and microbial growth.

Along with the removable, washable, 100% polyester 3-D Cloud Cover (two layers of 3-D spacer material quilted together), you can wash the core in the bathtub or shower (cold water only). The core is air dry only, which, according to Newton, takes anywhere from 2 to 6 hours, depending on ventilation and your local humidity levels. As such, we recommend investing in an additional safe sleep area like a travel crib to use if your little one needs a nap while the main mattress is drying. Also, Newton claims their cover is water-resistant, not waterproof, so it is a good idea to have an extra Newton Replacement Cover for use during washing, as they recommended the cover be machine-dried on cool or air-dried. There have been some complaints that the Wovenaire's cover is rougher to the touch, so for babies with sensitive skin, wash the outer cover before first use and consider using a crib sheet to help avoid irritation. Also, although the Wovenaire is Greenguard Gold certified, a short period of airing outside may be useful if you detect any odor.

Looking for natural materials?
The Newton Wovenaire is 100% NOT natural from its plastic mattress to its 100% polyester cover. If natural materials are on your wish list, then you need to look elsewhere.

There is no doubt that the Wovenaire is popular for a reason that concerns us. Newton markets the Wovenaire as "breathable," implying that a stomach-sleeping baby can breathe thanks to the mattress's design and that the structure prevents re-breathing exhaled carbon dioxide (a suspected risk factor for SIDS). We sincerely hope no one interprets Newton's "breathable" hype as a suggestion or recommendation to place infants on their tummy to sleep, as this is NOT a safe sleeping situation. Wovenaire or not, "breathable," or not, you should always follow safe sleep guidelines. Babies should always be put on their backs to sleep. There is no dispute about this as supported by the dramatic decrease in SIDS after the advent of the Back to Sleep campaign in 1994. Interestingly, supine sleeping carries more risk than just rebreathing carbon dioxide. In our opinion, Newton is capitalizing and relying on most parent's fears of SIDS. We don't care for this misleading marketing or preying on a parent's worst nightmare. Despite Newton's unfortunate marketing choices, we still feel the Wovenaire is an interesting, albeit expensive, crib mattress for its allergy-friendly attributes and washable core with a removable, washable cover. This design demonstrates the out-of-the-box innovation we like. But, please, always put your baby on their back to sleep.

Considered but Not Recommended


If you compare our favorites list to our other review categories, our favorites list probably looks small, where we typically include 15-30 contenders (or at least 10). We've completed hours and months of research, time, and effort going down the dark mattress rabbit hole to make our final selection of products. We considered well over 30 potential competitors. One by one, a multitude of products were slashed from the competition for reasons varying from questionable material safety to a lack of transparency (or downright lies) from the manufacturer.

Want more information on what's inside the mattress?
While potentially outdated with a publish date of 2011, this overview of crib mattresses and what they contain is a great place for you to learn more about mattresses and your baby's sleep surface.

Your baby will spend more time resting on their crib mattress than anywhere else, making its safety somewhat critical. So, while buying a crib mattress might feel like just another piece of gear to check off a list, it is a crucial item where safety should rule all. Because of this, we believe you should be more selective when choosing a mattress than you might be with other gear. We intentionally eliminated mattresses containing flame retardants, polyurethane foam, vinyl, and other materials we feel are questionable or wouldn't use with our children. If you don't see a mattress you've been considering, it might contain one or more of these questionable materials, and we encourage you to research your selection further before making a purchase.

Here are some examples of popular contenders that didn't make our list and why.

  • Sealy Everlite 2-Stage crib mattress / Sealy Perfect Rest — These Sealy mattresses are made by Kolcraft. After several weeks and five email attempts to receive information from the manufacturer, they finally gave us material information after we told them who we were. We think companies should be transparent about what materials are in their mattresses. We don't think the average parent would receive an honest answer from this company without significant effort and cajoling.

Colgate Eco Classica III
Colgate Eco Classica III
Credit: Colgate
  • Colgate Eco Classica III — In an email from the company, they claim this mattress is "eco-friendly." They also unnecessarily attempted to disparage other companies who use organic materials. Both responses leave a bad taste in our mouths. This mattress is not eco-friendly (it uses petroleum), and implying negative things about other mattresses doesn't make their mattress a better product. This mattress uses 24% "non-edible plant oil" to replace petroleum-based oil in its polyurethane foam. So, in other words, 76% of this foam still uses petroleum-based oil. The use of petroleum products and foam production is not particularly eco-friendly and certainly doesn't qualify this product as good for the environment. This company also told us via email that the "tag on the mattress says only what is legally required to be said on the mattress," we prefer transparency of all materials, not just what the law allows.

Nook claims this foam mattress is &quot;eco-friendly,&quot; &quot;healthy,&quot; &quot;safe,&quot;...
Nook claims this foam mattress is "eco-friendly," "healthy," "safe," "non-toxic," and "Earth Friendly," but is it?
Credit: Nook
  • Nook Pebble Pure Crib Mattress/Pebble Lite Eco-Friendly Crib Mattress — Some Nook mattresses have a foam core they claim is "non-toxic," we aren't entirely sure what they mean with this claim. We assume they are alluding to the CertiPUR certification. This certification only indicates that the foam meets the emission limitations outlined as acceptable by CertiPUR. The emissions are not equivalent to being "free of toxins." Therefore, we feel they intentionally mislead consumers with vague, undefined language and greenwashing (see below for more on Greenwashing). Also, their website lists the Pebble Lite Eco-Friendly as "environmentally friendly," which we believe to be false as the production of polyurethane foam isn't environmentally friendly due to its use of petrochemicals. So despite one mattress being natural and interesting, the overall greenwashing on the website is offensive.

Serta Tranquility Eco Firm
Serta Tranquility Eco Firm
Credit: Serta
  • Serta Tranquility Eco Firm — This mattress is advertised (on Amazon) as "non-toxic" and "natural." It is a polyurethane mattress that, while CertiPUR and Greenguard certified, is not "non-toxic" as it does off-gas VOCs. These two organizations' certification means the mattress meets the certification requirements; it does not mean it doesn't off-gas and is "non-toxic." It is also not "natural" as it uses human-made foam from petroleum instead of materials naturally found in nature like cotton. Also, in an email from the manufacturer, they tell us this mattress has a polyvinyl chloride (PVC) cover. Vinyl is a material we are not comfortable with and wouldn't use with our own babies. PVC has been shown to have adverse effects on health, including short term problems like headaches and dizziness to long term effects of potential liver cancer and central nervous system damage. It certainly isn't non-toxic or natural.

Moonlight Slumber Little Dreamer
Moonlight Slumber Little Dreamer
Credit: Moonlight Slumber
  • Moonlight Slumber Little Dreamer — The Moonlight company has a history of misleading marketing and lying exposed by the FTC including creating and awarding its mattress a made-up "green" certification. Combined with the regular use of polyurethane foam, this information is why you won't find any mattresses by Moonlight Slumber in this roundup.

Why You Should Trust Us


This review was led by a board-certified pediatrician and BabyGearLab founder, Dr. Juliet Spurrier. Dr. Spurrier, mom of 2, was instrumental in the mattress selection process. She used her knowledge as a physician to help research and choose healthy and more eco-friendly products than the competition. Wendy Schmitz, Senior Review Editor, and mother of 2 rounds out the mattress team. Wendy's obsession with baby mattresses began with her first child's birth and hasn't stopped since. In her quest to find an odor-free and natural mattress for her son, Wendy purchased and returned more than four products that all failed to live up to the hype or marketing for natural, limited off-gassing, or odor-free claims. Needless to say, both mothers take this topic and gear category very seriously, which is why this review contains a significant amount of information about materials, greenwashing, and health, and why only a few products made the list of contenders. We considered eco-health, safety, quality, materials, ease of use, and cleaning when making our product selections for this roundup.

Safe sleeping for babies starts with a firm, well-constructed...
Safe sleeping for babies starts with a firm, well-constructed mattress that fits snugly inside a safe crib.
Credit: Abriah Wofford

Guidelines for Safe Sleeping Environment


Given the Sudden Infant Death Syndrome (SIDS) concern, you must create and maintain a safe sleeping environment for your baby for every single sleep.

Back to Sleep


Sleeping on their back is the only safe position for sleeping babies to help avoid SIDS. The American Academy of Pediatrics (AAP) "Back to Sleep" campaign encourages and educates parents to place babies on their back to sleep every time. Studies indicate that little ones sleeping on their back are far less likely to have breathing difficulties that lead to SIDs. This back sleeping greatly reduces the risk of SIDS. Research shows that sleeping on their stomach increases a baby's risk of SIDS by two-fold. Since the campaign launch in 1994, the number of infants who have died from SIDS has decreased by over half! Now that is something to celebrate and more than enough evidence to support the back-to-sleep movement.

Unfortunately, SIDS is still associated with other preventable situations like a stomach or side-sleep positions, bed-sharing, too much bundling, a covered head, an overheated environment, and smoking in the home.

Firm Surface


A firm sleeping surface is critical for a great infant mattress, so set your sleeping preferences aside. Cushy memory foam toppers, sheepskin, fluffy down, or hammocks are not safe for babies even if you love them. Some crib mattresses provide dual firmness (called 2 stages) with an extra-firm side for infants and a firm but slightly softer side for toddlers. The firm surface helps prevent the mattress from indenting under the baby's weight for safer sleep. If the surface indents and your baby rolls to their stomach, this can make it challenging to roll back over or breathe unobstructed.

Dual-sided mattresses typically have a firm side for infants and a...
Dual-sided mattresses typically have a firm side for infants and a slightly softer side for toddlers.
Credit: Abriah Wofford

Any infant mattress you choose should have firm edge support that doesn't sag or significantly compress when pushed. This design helps prevent the entrapment of smaller baby parts between the crib slats and mattress. Foam mattresses often have squishier edges than innerspring, which makes edge inspection even more important. If the sides are easy to squash, you should return the mattress and look elsewhere.

You also need to be aware of the dangers of sagging mattresses. Our research shows a trend toward bio/plant-based foams significantly sagging over a short time. These are manufacturers like Colgate Eco and Sealy Soy-Foam that blend soy-based oil with polyurethane foam. If you choose this kind of product (which we don't recommend), you should pay extra attention when the product is new and every time you change the sheet to ensure sagging doesn't become a problem.

While all mattresses should be the same size, they tend to vary...
While all mattresses should be the same size, they tend to vary somewhat, which can impact how well they fit in any particular crib.
Credit: Abriah Wofford

Baby Sleeps in Their Own Space


Besides a traditional crib with a crib mattress, acceptable sleep areas for a baby include bassinets (until 4 to 5 months old) and travel cribs. It is not safe for babies to sleep in the same bed with others or on couches or other furniture. It is also not safe for a baby to sleep in their car seat carrier, swing, bouncer, or similar gear because it can potentially cause airway obstruction when their head falls forward onto their chest. Do not get in the habit of leaving your little one sleeping in any of these potentially compromising situations. While a swing might soothe them to sleep, the risks are not worth the moments of peace.


Snug Fit


Mattresses should fit snuggly inside the crib with less thantwo-finger width gap between the mattress's edge and the crib frame. If your mattress and crib combo has a wider gap, you'll need to purchase a different mattress or crib to ensure a safe sleeping environment.

Bare Crib


Babies should sleep in a bare crib. While this isn't cute or picture-perfect, a crib without bumpers, soft bedding, pillows, stuffed animals, and toys are the only safe way to sleep. The only things that should be in the crib are the mattress with a tightly fitted sheet and your baby asleep on their back. The Newton Wovenaire recommends only using the cover that comes with the mattress to get the most from the "breathable" design. Do NOT confuse this "breathable" marketing with putting your baby to sleep on their stomach. Despite the breathable claim, the only safe way for a baby to sleep is on their back! Do not take the risk!

New Mattress with Each Baby
When it comes to beds, the recommendation is that every baby should have a new mattress. A Scotish study shows there is an increased risk of SIDs with the use of a used crib mattress. The risk increases if the mattress comes from another home as opposed to use by a sibling. This recommendation means no hand-me-down mattresses. However, as long as the crib is in good shape and adheres to current crib safety guidelines, the crib itself can pass from one child to another.

Crib Quality


New cribs must adhere to certain safety standards, which is why it isn't a good idea to use a second-hand crib, especially if it has been in your family for years or was yours as a child. Things to look for when choosing a crib:

  • Slat Width — The side slates of the crib should have spacing no more than 2 3/8" in width.
  • Corner Posts — The corner posts of the crib should not extend more than 1/16" to avoid strangulation by clothing snagging
  • Solid Construction — All screws, brackets, and joints on the crib should be nice and tight with all sharp edges and metal out of the baby's reach.
  • Decorative Embellishments — The headboard and footboard on the crib should not have decorative cutouts or additions.
  • No Drop Down — While cribs no longer come in drop-down options, it wasn't that long ago when you could buy one. This crib style has a history of injuries and accidents, including death, so take a hard pass on the drop-side; it isn't worth the risk no matter how much money it will save.

Check out our review on the Best Baby Crib to get more help on finding a great crib for your little one.

To assess sagging potential, we tested some mattresses with a 30 lb...
To assess sagging potential, we tested some mattresses with a 30 lb weight in the center over several months trying to create a worst-case scenario where sagging might occur.
Credit: Abriah Wofford

So, you thought buying a mattress was as simple as finding a good fit at the right price. However, there are other things you should consider concerning materials and everyday use as you will use this product for 2-4 years.

Ease of Use


  • Weight — While a mattress sits immobile in your crib most of the time, the weight matters when you lift and move the mattress to change the sheet. If you have trouble lifting heavier items or don't want to, you'll want to look for a lightweight product. The Naturepedic Organic Cotton Classic 150 Seamless 2-Stage is 20 lbs, the heaviest in this group, which could be a no-go for some. Alternatively, the Babyletto Pure Core with Dry Waterproof Cover is 9 lbs, and the Lullaby Earth Breeze 2-Stage is about the same. Given that nightly sheet changes could be in your future, it is important to consider mattress weight.

  • Ease of Cleaning — Every baby has accidents, and no matter what the accident's consistency might be, the mattress will need regular cleaning. The only washable product in this review is the Newton Wovenaire, but others have waterproof/wipeable surfaces, or you can purchase a mattress cover or pad.

  • Waterproof — Unlike regular mattresses that don't typically require the use of waterproof or water-resistant covers, many crib mattresses come with this feature. Waterproofing makes for easy cleaning, and it limits the need for additional bedding that might add thickness. Most water resistance in mattresses comes from the use of Polyethylene/Polymer in the mattress's cover. This component is food-grade grade" polyethylene. We recommend avoiding products that use vinyl or PVC as these components can cause potential health issues.



  • Materials — Mattresses can include all sorts of materials from polyurethane to organic cotton and natural latex. Some have foam components to create a firmness, while others have inner coil springs. We recommend choosing as natural as possible and paying attention to certifications to help your baby avoid inhaling VOCs during sleep.

  • Odor-Free - Does the crib mattress emit a strange chemical smell? This odor is off-gassing, otherwise known as volatile organic (not the cool kind) compounds (VOCs). If you choose a mattress with that "new" smell, we recommend airing it out until the smell dissipates. Better yet, send it back and get one that doesn't smell. Why? Because no smell doesn't mean it isn't off-gassing. Looking for Greenguard Gold Certification can help reduce VOCs and other toxins. Choosing natural products that don't off-gas is the best option if your budget allows it.

  • Flame Retardant-Free — We recommend choosing mattresses that are free of chemical flame retardants. This lack of chemicals doesn't mean the bed is kindling waiting to burst into flames; it only means that the product meets the flammability and smoldering laws without using chemicals that could potentially be harmful to your baby. Less is more when it comes to chemical additives, in our opinion. Natural wool is excellent at offering flame resistance without chemicals.

Some of the mattresses in this review include dense polyethylene...
Some of the mattresses in this review include dense polyethylene (Naturepedic, above left) or polyester (Wonder Dream, above right) to keep the mattresses lightweight without the same concerns you get with polyurethane foam.
Credit: Abriah Wofford

Materials


Companies specializing in crib mattresses (i.e., Naturepedic) tend to have healthier, better products than large conglomerates (i.e., Kolcraft/Sealy, Serta/Delta Children's). While not a hard and fast rule, it rings true for the most part. There are things you should look for when making a decision, no matter what the brand or marketing hype. The materials are important, and we can't emphasize enough that you should pay attention to the materials and their certifications.

The Naturepedic Organic Cotton Ultra Seamless Crib Mattress features...
The Naturepedic Organic Cotton Ultra Seamless Crib Mattress features a premium 252 coil innerspring plus strong 9 gauge edge support.
Credit: Naturepedic

Innerspring


A traditional innerspring mattress has inner metal coils for firmness and support. This mattress style is cumbersome compared to foam products, and some parents claim they feel resistance that causes pressure points. However, firmness is vital for babies to help avoid SIDs, and babies are lightweight enough that it is doubtful that they feel pressure points the way an adult does.

Foam


Some foams are better than others, and certified foam is potentially better than those without certifications. However, we are not fans of polyurethane foam, no matter its certification or what percentage comes from plants. Why? Foams are a petroleum-based product with added chemicals to create the cellular foam structure, and as a result, they emit VOCs. VOCs create an unhealthy breathing environment that can potentially cause health problems in the short and long term.

Which certifications apply to foam products?
  • The CertiPUR CertiPUR-US foam certification is a group comprised and run by those in the foam industry. This certification checks for the use of banned chemicals and tests for VOCs up to a certain limit that is defined by foam producers. While we concede this is better than nothing, this isn't the best certification as the certifier benefits ($$) from certifying foam as they also work in foam production and sales. It is similar, in our opinion, to the fox guarding the henhouse. Would you trust a fox to protect your chickens? Would you trust the foam seller to tell you foam is safe?

  • GreenGuard is a third party governing body that tests and certifies materials used in building products, furniture, and other items to ensure "better" indoor air quality. The certification allows for no greater than 1/100 of the currently published ACGIH┬« Threshold Limit Values (TLVs) and no greater than one-half of California's Chronic Reference Exposure Levels (CRELs).

While we recognize you can't avoid all VOCs in the modern world, we feel you should make an effort to limit or avoid them when you can, and your baby's sleeping surface is the perfect place to start being proactive about chemical exposure. We prefer GreenGuard certifications over CertiPUR. Why? Because GreenGuard is a third-party tester, while CertiPUR is owned and operated by those that create and benefit from the sale of foam. Neither certification means the foam is as safe as organic or natural materials, nor does it mean no VOCs, non-toxic, or even a "safe level of VOCs," as no one has yet determined what a "safe" level of VOCs might be.

Don't Forget
Foam-based mattresses may not work with some movement monitors. If you hope to use a sensor pad mattress movement monitor, you'll want to find a good innerspring mattress and skip the foam to ensure compatibility. Check your monitor user guide for more details.

Textiles: Cotton and Wool


The best materials in a mattress include natural textiles like GOTS certified cotton and wool. The inclusion of these types of materials increases the mattress's health and can be crucial for children with allergies or asthma. The GOTS standard includes the processing, manufacturing, packaging, labeling, trading, and distributing textiles that are at least 70% certified natural organic fibers. The My Green Mattress Emily Natural has a GOTS certified organic cotton cover with Oeko-Tex certified natural wool.

For products that carry the GOTS label of "organic," they must have a minimum of 95% certified organic fibers. Products labeled "made with organic" must have a minimum of 70% certified organic fibers. These certifications give discerning parents confidence in their purchases. There are other cool things about being GOTS certified (for the environment and fellow humans), and we encourage you to read more about it.

Latex


Latex is a great alternative to memory foam and traditional mattresses. Natural latex is breathable, supportive, renewable, and antimicrobial (they even repel dust mites!). These properties make it ideal for people with asthma, allergies, or other sensitivities to chemicals. It can come in a 100% natural option, synthetic, or blend. You'll want to research to see precisely what kind of latex a potential mattress uses, so you can determine if it meets your needs and health or environmental goals. We prefer natural latex and encourage parents to look for GOLS Certified Latex, which is processed with only natural ingredients, or a 100% natural designation to avoid unintentionally buying a synthetic blend. A certification from the Control Union Certifications is the first global standard for organic latex. GOLS defines requirements for latex products from organic raw materials and non-organic materials.

Latex Allergies
For the most part, even those with latex allergies or sensitivities can still safely select a latex mattress for sleeping. The user is not exposed to the latex portion of the product, and it doesn't off-gas. Because mattresses are traditionally encased in cotton or other natural fibers, the potential for exposure to the latex itself is virtually non-existent if the mattress is in good condition. If you have a significant latex allergy or other concerns, you can discuss this with your doctor. In our research, most latex mattress manufacturers have a very generous return policy, including some up to a year after purchase, as long as the mattress is not stained or damaged.

Synthetic vs. Natural Latex

Natural latex comes from extracting the milk from the rubber tree, 40% of which is pure latex. Each manufacturer has a proprietary method of processing the milk. Some will use up to 70% of the milk to create latex instead of purifying the milk closer to 40%. Blended latex, or Dunlap, is a combination of natural and synthetic components that bring the elasticity of natural latex together with the stability and firmness of synthetic additives. Talalay Latex is technically a blend of 70% synthetic and 30% natural latex. Talalay latex generally lasts longer and can be produced in different firmness levels. To confuse things further, Talalay Natural Latex is classified as 100% natural and includes 98% natural latex with 2% synthetic as a bonding agent. This latex is generally the most expensive and shouldn't be confused with Talalay, which doesn't specify "natural." Whew! Confusing right? You betcha.

Nook Pebble Pure
Nook Pebble Pure
Credit: Nook

Coconut Coir


Coconut coir may conjure up thoughts of the coconut's hard shell, but this material is much softer but still firm enough to provide infants adequate support. As a natural product, coir is free of harsh chemicals and flame retardants, making it an excellent choice for families looking for natural alternatives. It is firm, springy, breathable, durable, and allergen-free. Coconut coir can be found in the Emily Natural by My Green Mattress in this roundup. We can't wait to see how manufacturers will utilize this renewable resource in the future.

Waterproofing


Not all baby mattresses are waterproof. However, a waterproof mattress is handy when your baby has a blowout or vomits, and you need to clean things up to go back to bed. To create a waterproof surface, the mattress must contain some synthetic material, and many of the options in use today are potentially toxic. So, what is the point of creating an organic mattress only to wrap it in an off-gassing material? Good question! Finding a good water-proofer that doesn't ruin a natural mattress can be tricky and often comes down to choosing the lesser potential evils.

The waterproofing material we prefer is polyethylene, which is non-toxic and relatively inert and traditionally found in products that come in contact with food. This coating is in the Naturepedic mattress and some mattress covers. Alternatively, we are not fans of vinyl. Vinyl off-gasses and some types can crack or break down, making it a poor option for long-term use. There are different types of vinyl, but in our experience contacting manufacturers, it is challenging or impossible to get them to identify what type they use. This lack of information leaves us to assume that the vinyl they use could off-gas into your baby's sleeping environment. We did not choose mattresses in our roundup with vinyl or unspecified waterproofing for health reasons. If we weren't sure about waterproofing material, we always attempted to contact the manufacturer for more information. Not all of them responded.

What is "medical grade" waterproofing?
Good question! After seeing this phrase on several Sealy mattresses, we wondered this too. We sent an email to Sealy three times and received no answer. We also did a deep dive on their website only to come up empty. Without direct information from the manufacturer, it can be challenging to determine exactly what this claim means or includes. We will say that "Staph-Guard" is likely a chemical additive that your baby and mattress don't need. We recommend avoiding most chemicals, especially those you can't identify. This advice holds especially true when the manufacturer won't identify the materials when you contact them specifically about the chemical. While we can't remark on the efficacy of this kind of product, we feel confident it is likely unnecessary for an at-home mattress.

If the mattress you choose doesn't have a waterproof cover, it is critical that you use a waterproof pad or added cover to prevent mold and bacteria from growing inside the mattress once it gets "wet." We like the Naturepedic Organic Waterproof Fitted Crib Pad. Some parents prefer the all-natural option of 100% wool "piddle pads," which repel liquids but aren't waterproof. If you choose this route, you must catch accidents immediately and clean and dry your mattress properly after every incident. If you prefer a wool pad, you might consider the Newton Wovenaire mattress. This mattress is completely washable, so a waterproof cover isn't essential, and a wool pad could work well.

Whether or not you choose to waterproof your crib mattress is up to you. A versatile option is the Babyletto Pure Core combined with the Babyletto Smart Cover (water-repellent/moisture-wicking), which is Oeko-Tex certified, or a Hybrid Waterproof Cover with a waterproof lining and organic cotton layer.

Flame Retardant Free
We intentionally only chose crib mattresses that do NOT contain flame retardant chemicals for our roundup. However, some crib mattresses available for purchase still legally use flame retardants. We believe it is critical to consider the materials or chemicals that go into what your baby sleeps on. Mattress materials are critical as little ones spend up to 10-14 hours a day sleeping and breathing deeply in their crib. With changes for flammability and smoldering limits of upholstered furniture laws in 2013, Technical Bulletin 117-2013, manufacturers have more freedom on creatingsafe mattresses without the use of chemical flame retardants. We recommend looking for flame-retardant-free mattresses and using your purchasing power to encourage manufacturers to make safer products. Chemical-free products are still safe and meet flammability safety requirements without the use of potentially harmful chemicals.

Breathable Mattresses: Evidence-Based or Marketing Hype?


Some mattresses claim to be "breathable." While we love innovative and potentially better or safer mattresses for babies that can potentially help prevent re-breathing carbon dioxide, we worry the marketing of these options will encourage or mislead parents into disregarding the "back to sleep" recommendations that have been saving babies' lives since 1994. These breathable claims prey on parent fears of Sudden Infant Death Syndrome (SIDs) based on the presumed reduced re-breathing of carbon dioxide. However, research indicates that "breathable" products WON'T prevent re-breathing and that babies sleeping on their stomachs can lead to SIDs for reasons other than re-breathing. For example, reduced cerebral oxygenation, impaired arouse-ability in young infants, altered cardiovascular control/lower blood pressure (circulatory failure in 2-3-month-olds). Also, several studies indicate that tummy sleeping in very young infants (<5 months) increases the risk of cardiovascular collapse and decreased respiratory drive irrespective of re-breathing carbon dioxide.

Don't buy into the breathable hype. If you prefer a breathable mattress, that's cool. We like the innovative Newton Wovenaire or the Wonder Dream. However, even with these types of mattresses, you should ALWAYS practice safe sleeping, including putting the baby to sleep on their back. Every. Single. Time.

The self-awarded, made up certification badge that the Moonlight...
The self-awarded, made up certification badge that the Moonlight Slumber Mattress company awarded to its crib mattresses. The FTC penalized the company for misleading consumers by creating a false badge that means nothing.
Credit: FTC

Greenwashing is any marketing or branding that intentionally uses misleading language to make the consumer believe a product is healthy, good for them, or environmentally friendly (green) when it isn't. This marketing hype is an intentional deception by the manufacturer to persuade consumers to buy products they believe are eco-friendly or non-toxic when, in reality, they are neither. Being green is awesome, and when a product is 100% organic, GOTS certified, B Company certified, etc., then the marketing is just "green." When a company uses terms like "eco-friendlier," "eco-foam," or "hypoallergenic," it can potentially be greenwashing, as these terms do not really mean anything. We encourage consumers to question and investigate ALL claims, especially if the claims seem vague, undefined, or seem too good to be true. In our extensive mattress research, we saw a disturbing amount of greenwashing and misleading language in the mattress industry as a whole. This kind of deceptive language can make it extremely challenging for parents to find healthy products for their children.

Need more info?
You can find out more about the seven sins of greenwashing so you won't be a victim. According to a recent report, over 98% of "green products" commit at least one of the greenwashing sins in marketing.

So how do you recognize greenwashing? In our research, we encountered significant greenwashing. So much that we decided to help others identify greenwashing when they see it. If you research mattresses and see any of the following words or eco-labels, you may be being greenwashed: eco-friendlier, eco-foam, certified, hypoallergenic, plant-infused, soy foam, and any language that feels vague or deceptive. Let's define some popular terms and explain why they aren't as innocuous as you might think.

  • Eco-friendlier/Eco-foam — We saw these terms in marketing for several mattresses, specifically the Eco Classica III Eco-Friendlier Crib Mattress. The phrases imply that the product is good for the environment or at least better for the environment than other foam mattresses. Upon investigation, we think this claim comes from the use of 24% "plant materials" in their "urethane foam." Polyurethane foam traditionally uses petroleum with additional chemicals (catalysts) that create a chain reaction to produce foam. While this company might be using 24% renewable plant resources, the foam still requires 76% petroleum and the same potentially harmful chemicals for the reaction to create the foam cell structure. As a result, the mattress still off-gases VOCs and contains the same materials we dislike in polyurethane. Also, this product is not environmentally friendly (as it implies). It is still a petroleum-based foam with a similar carbon footprint as regular polyurethane. However, it often costs more than the competition as the manufacturer hopes you'll buy into the hype and spend more on an Earth "friendlier" mattress.

  • Plant Infused/Soy Foam/Natural Foam — We saw these ambiguous phrases in advertising for multiple mattresses that use a percentage of plant oil in their foam. They are often CertiPur, GreenGold certified, and many claim to be "good for your baby" or "natural" foam. However, these foam products still contain petroleum and toxic chemicals that emit VOCs. The fact that it includes a small percentage of plant oil is essentially irrelevant. The final product comprises similar properties as the polyurethane foam it claims to be better than. To be clear, there is no such thing as a natural "foam" unless it describes natural latex. Sadly for everyone, there isn't a foam plant that sprouts little foam buds that magically turn into natural mattresses.

  • Hypoallergenic — You'll see this term in marketing for all sorts of products. However, it means virtually nothing. Consumers usually assume it means that a product is suitable for allergies or asthma. Maybe you think it means the product is inert or doesn't cause allergic reactions. But does it mean this? Hypoallergenic is an "unregulated" word, which means it has no true or agreed-upon definition in any industry. Any company can use the phrase without testing or offering supportive evidence to indicate what they claim it means. This lack of regulation means that the definition of hypoallergenic means something different to every company. Unfortunately, as a consumer, you can't be sure what it means from product to product or even if the company making a claim has done testing to support the claim. We think labeling any foam mattress as "hypoallergenic" is intentionally misleading as the chemicals that make the foam can be toxic and unhealthy, and the foam itself off-gases.

Buyer Beware


We wish that all mattress manufacturers were transparent about the materials they use. Unfortunately, most are not, and the law does not require them to tell the consumer the details about what they use. As a result of this lack of transparency, we think you should spend your valuable money with companies that believe in and respect your "right to know." We encourage everyone to reward transparent companies that relay the entire truth by choosing to purchase their products when they meet your needs and goals. At the very least, we highly encourage that parents avoid buying from companies that use greenwashing and misleading language to influence or confuse consumers about their products or materials.

Finding a great crib mattress includes so many considerations from...
Finding a great crib mattress includes so many considerations from type, materials, and whether or not it fits in your chosen crib.
Credit: Abriah Wofford

We spent a full year researching over 100 crib mattresses to find truly healthy and safe options we love and would for our babies. Choosing a great crib mattress doesn't have to be as exhausting as it used to be. Thankfully, we have more options than ever, and significantly more companies are creating eco-healthy products compared to even five years ago. If you focus on a few key factors in mattress selection, you should be able to find the right mattress for your little one fairly quickly. Once you know your budget, we suggest choosing the best product with the healthiest materials within your budget restrictions. If you aren't sure about our selections and are the type that likes to do their own research, we recommend you to stay vigilant about greenwashing and that you do your best to avoid off-gassing materials (i.e., polyurethane foam and vinyl). Because babies spend a significant amount of time in their crib, we strongly believe you should choose the highest-quality mattress you can afford. We prefer natural materials (i.e., latex and cotton) over those filled with chemicals (i.e., foam, vinyl, and other additives) to help create a healthier environment for your little one to snooze and dream.


Juliet Spurrier, MD and Wendy Schmitz