In-depth reviews guided by a Pediatrician

Kirkland Signature Supreme Review

Durable and cozy diaper with good performance for the price
Best Value Award
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Price:   $0.20 List | $0.26 each (in 198-pack) at Amazon
Pros:  Durable, comfy, price
Cons:  Health, not very eco-friendly
Manufacturer:   Kirkland
By Juliet Spurrier, MD & Wendy Schmitz  ⋅  May 24, 2018
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58
OVERALL
SCORE


RANKED
#7 of 22
  • Absorption - 40% 6
  • Leakage - 20% 6
  • Comfort - 15% 9
  • Health - 15% 3
  • Eco-friendly - 5% 1
  • Durability - 5% 7

The Skinny

Kirkland Signature Supreme disposable diapers are a good value with better than average performance in most metrics. This diaper is comfortable and durable, which can translate to even more savings by avoiding the throwaway faulty diapers that come with some of the competition. The signature offers impressive absorption and leak prevention according to tests. While they didn't offer top of the line performance, they provide decent results for the price, making them a top consideration for families on a budget. These diapers don't do much in the way of environmental concerns or offering a product free of known potential skin irritants. Still, if what you want is a reliable diaper that won't break the bank, then the Kirkland diaper may be the right choice for you, which is why it won the Best Value award. You can purchase this inexpensive option without a Costco membership.

Compare to Similar Products

Our Analysis and Test Results

The Costco Company, a wholesale retail store, owns the Kirkland brand. This private label brand strives to bring quality products to consumers at a price saving value. The Kirkland Signature label is on about 20% of the products offered at Costco, and they strive to provide products that are equal to or better than the name brand options so they can better control the quality of products and help drive down the price on national brands at the same time. You can find the Kirkland label on a variety of items, from diapers to dog food and everything in between.

Performance Comparison


Absorption tests on the Kirkland diapers indicated it absorbs liquids quickly so baby can stay drier.
Absorption tests on the Kirkland diapers indicated it absorbs liquids quickly so baby can stay drier.

Absorption


This diaper earned a decent score for absorption. Its above average results were consistent across repeated tests indicating a level of attention to consistency in the manufacturing process we didn't see in all of the competition.


The Kirkland diaper has a small amount of moisture transfer to the filter paper, but the amount is minimal compared to the competition. Less transfer is better because it means the diaper is good at locking moisture away, which helps prevent leaking and keeps your baby's skin drier.

The Kirkland diaper absorbed quite a bit of urine between changes without falling apart or leaking.
The Kirkland diaper absorbed quite a bit of urine between changes without falling apart or leaking.

Dry skin means less potential for irritation or diaper rash as a result of chronic wetness. Our testers felt the diaper was better for daytime wetting as it struggled with significant overnight wetting, which results in some leaking.

Only a small amount of mock urine made it to our leakage pan but online reviewers felt this diaper may leak more than the higher priced competition.
Only a small amount of mock urine made it to our leakage pan but online reviewers felt this diaper may leak more than the higher priced competition.

Leakage


The Kirkland diaper has average performance when it comes to leakage.


In our run-off test, this diaper did particularly well, with only a small amount of mock urine dripping into the pan. This test result means that the diaper absorbs liquids quickly, which should result in a lower potential for leaks in the real world. However, in our online research, this diaper has a more significant percentage of complaints on Amazon concerning leaks than some of the competition. Leaking isn't a significant issue, but there is a greater occurrence than the higher scoring diapers. For the price, however, this diaper impresses with its combination of higher leakage and absorption scores than other similarly priced options.

Kirkland diapers are super soft with skin friendly elastic  motion points  tabs  and cuffs.
Kirkland diapers are super soft with skin friendly elastic, motion points, tabs, and cuffs.

Comfort


Kirkland earned one of the highest scores for this metric. This diaper managed to pull off something somewhat rare by being both comfortable and durable (see below).


This diaper has a soft backing and an inner liner that feels more like actual fabric than most of the diapers we tested. However, it shines when it comes to the elastic and motion points that have a smooth and skin-friendly feel. Even the closure tabs and cuffs feel less abrasive than most of the competition, giving this diaper a cozy fit and feel.

Given the amount of time little ones wear their diaper  it is important to consider what the diaper is made of and what it is missing.
Given the amount of time little ones wear their diaper, it is important to consider what the diaper is made of and what it is missing.

Health


Kirkland did not score well for health, in part because they don't provide a disclosure list of what is in the diaper or what they avoid using. It fell below average for the group.


Many of the store brand or discount diapers seem to be forgoing any consideration for known irritants. Still, we think being free of these common additives is a step in the right direction that all brands should be making for baby's health and skin. This diaper does not indicate if it is free of chlorine, something most diapers are moving towards to avoid the impact on the environment and the development of dioxins. For health, this diaper only mentions being perfume-free; it says nothing about lotion, dyes, latex, or chlorine, which is a disappointment.

We experienced some skin rashes around the waistband of the Kirkland with one tester.
We experienced some skin rashes around the waistband of the Kirkland with one tester.

The potential for one or more of these known irritants to be in the diaper could be the reason that one of our testers had an adverse skin reaction to the waistband of the Kirkland. Without more information, it would be difficult to say what caused the rash, but moisture is unlikely given the location.

Ecological


Like most store brand diapers, the Kirkland product doesn't offer much in the way of being environmentally friendly, scoring near the bottom of the group.


Unfortunately, Kirkland does not offer even a partial disclosure of the manufacturing process of these diapers. Given that most companies love to brag about their environmental benefits, we assume this means they've made no effort to improve the overall impact of this diaper on the Earth. Considering that no disposable diaper is great for the environment, we certainly prefer to see companies at least making an effort to improve their products with the Earth in mind. This diaper does not appear to be chlorine-free, nor is it made with renewable or sustainable resources or plant-based plastics. While you can recycle the box it comes in; it doesn't use recycled materials in its packaging. Some advances it could try would be using bamboo or corn-based resources, improving the potential for biodegradability, and incorporating recycled materials into its design or packaging. Some diapers have moved to compostable materials and bamboo covers and liners for a more Earth-friendly configuration.

The Kirkland diaper is very durable with no reviews or testers experiencing any issues with faulty tabs or leaking SAP.
The Kirkland diaper is very durable with no reviews or testers experiencing any issues with faulty tabs or leaking SAP.

Durability


With one of the highest scores for durability, the Kirkland diaper beat out many other options.


During testing, we did not find any issues or problems with faulty tabs or falling apart. There were no SAP leaks or tearing back fabric. Users online had similar results with 0 of 137 reviews we read discussing any problems with durability.

The Kirkland is a durable diaper that withstands a busy baby.
The Kirkland is a durable diaper that withstands a busy baby.

Being durable and comfortable is a rarity in the world of diapers and something to consider. Some of the other diapers we tested have repeated durability issues resulting in a certain percentage of diapers being unusable, which increases the overall cost of the diapers and the annoyance factor.

Manufacturer Video



Juliet Spurrier, MD & Wendy Schmitz