In-depth baby product reviews led by a Pediatrician

Britax B-Safe Ultra Review

Generally average option with below average crash test results
Britax B-Safe Ultra
Credit: Abriah Wofford
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Price:   $250 List
Pros:  Easy to install with belt and w/out base, comfy, lower price
Cons:  Heavy, below average crash test analysis, harder to use LATCH
Manufacturer:   Britax
By Juliet Spurrier, MD & Wendy Schmitz  ⋅  Dec 21, 2021
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57
OVERALL
SCORE


RANKED
#15 of 15
  • Crash Test - 20% 3.5
  • Ease of Install - LATCH - 20% 7.0
  • Ease of Install - Belt - 10% 7.5
  • Ease of Install -w/o Base - 5% 8.0
  • Ease of Use - 15% 6.4
  • Comfort/Quality - 15% 6.9
  • Weight/Size - 15% 3.0

The Skinny

The Britax B-Safe Ultra is a low-scoring infant car seat with disappointing crash test results and a harder-to-use LATCH system. With average results in most of our tests, this seat struggles to keep up with the competition and as least one Britax competitor. While it is easy to install using the vehicle belt, it is heavy and harder to carry making it a poor choice for urbanites who may need to carry the seat further distances. This Britax is comfier than other Britax infant options with nicer materials and better design, but it still can't meet the performance found in other competitors with similar prices.

Editor's Note: Updates were made to this gear review on December 20, 2021. These changes include more details on our products recommendations.

Compare to Similar Products

 
Britax B-Safe Ultra
Awards  Editors' Choice Award Editors' Choice Award Best Value Award Best Value Award 
Price $250 List$300 List
$299.99 at Amazon
$270 List
$249.99 at Amazon
$220 List
$219.99 at Amazon
$110 List
$109.99 at Amazon
Overall Score Sort Icon
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Star Rating
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Pros Easy to install with belt and w/out base, comfy, lower priceBetter crash test results, anti-rebound bar, easy installReasonable price, better crash test results, super easy LATCH installEasy LATCH installation, better crash test results, priceInexpensive, good HIC score, easy to install with 2 methods
Cons Heavy, below average crash test analysis, harder to use LATCHHeavier, harder to install LATCH system, few strollers are compatibleHeavier, canopy/handle rubbingCoarse fabric, heavier, hard to install without the baseLess padding, lower quality, harder to install with belt
Bottom Line Generally average option with below average crash test resultsA great all-around seat with good crash test results, but limited stroller optionsA really nice seat with better crash tests analysis and a reasonable price tag, but it could be too heavy for some usersCrash test results and ease of install with a nice price make it a good choice for most familiesA budget-friendly seat with better head sensor crash results and easy LATCH installation
Rating Categories Britax B-Safe Ultra Peg Perego Primo Vi... Chicco KeyFit 35 Chicco KeyFit 30 Baby Trend EZ Flex-Loc
Crash Test (20%)
3.5
7.5
7.5
7.5
5.5
Ease of Install - LATCH (20%)
7.0
7.0
9.5
8.5
6.5
Ease of Install - Belt (10%)
7.5
9.0
7.0
5.5
5.5
Ease of Install -w/o Base (5%)
8.0
9.5
7.0
4.0
6.5
Ease of Use (15%)
6.4
6.6
7.1
6.6
4.9
Comfort/Quality (15%)
6.9
8.1
6.5
4.7
4.6
Weight/Size (15%)
3.0
6.0
5.0
5.0
7.0
Specs Britax B-Safe Ultra Peg Perego Primo Vi... Chicco KeyFit 35 Chicco KeyFit 30 Baby Trend EZ Flex-Loc
Crash Test HIC Score 598 491 342 330 617
Crash Test Chest G Clip 57 46 51 50.5 51
Minimum Passenger Weight 4 lbs 4 lbs 4 lbs 4 lbs 4 lbs
Max Passenger Weight 35 lbs 35 lbs 35 lbs 30 lbs 30 lbs
Max Passenger Height 32" 32" 32" 30" 30"
Belt Routing Style European European European American European
Seat Weight 11.6 lbs 9.6 lbs 10.9 lbs 10.1 lbs 8.6 lbs
Recline Positions 5 Infinite 5 5 4
Shoulder Harness Positions 6 6 5 3 3
Crotch Strap Positions 2 1 1 1 1
Built in Lock Off Yes Yes Yes Yes No
Anti-rebound Device High Back Base Yes Yes Built in High Back Base No
Load Leg No No No No No
Locking Handle Positions 4 5 4 3 3
Allowed Handle Positions For Auto Travel Any 1 for Base Install (even with the top of the seat),
1 for Seat Only Install (all the way forward)
Carry Position
Stationary Position
Rocking Position
Any Not Listed
Head Support No Yes Yes Yes Yes
Newborn Insert Yes Yes Yes Yes Yes
No Rethread Harness Yes Yes Yes No No
Onboard Manual Storage Covered storage towards front of base. Stores in a hard flip down pocket on the back of the seat. Storage Compartment on front of the base. Storage Compartment on the front of the base. On the back of the seat towards the bottom.
Level Indicator On Base Weighted Wheel/Dial Bubble Vial Bubble Indicator Bubble Vial None
Level Indicator On Seat Line On Decal Line On Decal Line on Decal Line On Decal Hanging Indicator

Our Analysis and Test Results

Britax believes families can enjoy every moment more if they have the right product to make life easier. The company tries to create products, like car seats across types and strollers, with intuitive, safe designs with children in mind. Britax has been creating baby gear for 70+ years and came to the USA in 1996.

Performance Comparison



Britax B-Safe Ultra infant car seat - the base bottom on the ultra has the honey-comb shaped "absorbers"...
The base bottom on the Ultra has the honey-comb shaped "absorbers" Britax claims are part of its crash test safety features.
Credit: Abriah Wofford

Crash Test


The B-Safe Ultra crash test results indicate a basic level of protection compared to competitors in this review.

While the sensor results in our crash test of the Ultra do fall within federal guidelines (FMVSS 213), other competing seats have better results indicating a potential additional margin of protection compared to the Ultra.

Britax B-Safe Ultra infant car seat - a comparison of the ultra vs the top performing seat for hic, the...
A comparison of the Ultra vs the top performing seat for HIC, the Chicco Keyfit 30.
Credit: BabyGearLab, MGA Research

The charts compare the Ultra (in black) to the products with the best sensor results for each region (head and chest). The head sensor (HIC) top performer is the Chicco Keyfit 30 (in green) with a 330 compared to the Ultra's 598. The Keyfit 30 has the best sensor readout in the group, with a value the furthest from the maximum allowed of 1000 (lower is better).

Britax B-Safe Ultra infant car seat - the chest clip sensor results from the crash test for the b-safe...
The chest clip sensor results from the crash test for the B-Safe Ultra compared to the top-performing chest sensor in the Cybex Aton 2.
Credit: BabyGearLab, MGA Research

The Cybex Aton 2 (in black) chest sensor result of 44 is the best or lowest result in the group where lower is better, and the Ultra chest result is 57. The maximum allowable result for this sensor is 60, putting the Ultra close to the limit.

Britax B-Safe Ultra infant car seat - the headrest assembly on the ultra has epp foam for force absorption...
The headrest assembly on the Ultra has EPP foam for force absorption in the even if an accident. We assume this is part of the side impact protection (SIP) that Britax boasts about.
Credit: Abriah Wofford

Britax claims some kind of side impact protection (SIP) and has a honeycomb-shaped impact zone on the shell of this seat to "absorb forces." We could not locate any information on how these features were tested or even if they were. There is no federal requirement to test these features or claims for truth or efficacy. Plus, there are no agreed-upon definitions for things like SIP when it comes to the car seat industry. We would love more transparency about these features and what they bring to the table.

Britax B-Safe Ultra infant car seat - installing the ultra using the latchsystem isn't as easy as other...
Installing the Ultra using the LATCHsystem isn't as easy as other methods, but it isn't challenging either.
Credit: Abriah Wofford

Ease of Install - LATCH


In our tests, the Ultra earns its lowest installation performance with the LATCH system. Given that LATCH is supposed to be an easy way to install a car seat to ensure a stable connection, it is a shame that the Ultra fails to offer ease of use in this test. While it is challenging compared to some of the competition, it isn't a struggle either.

The Ultra has the easier to use push button LATCh connectors that...
The Ultra has the easier to use push button LATCh connectors that release from the anchors with the press of a button.
The Ultra has two center LATCH tightening straps that aren't as easy...
The Ultra has two center LATCH tightening straps that aren't as easy to use as some of the competitors with unique tightening methods.

This Britax offers push-button LATCH connectors (above left) that click-in to anchor points on your car. The clips attach easily when you push them directly onto the U-shaped anchor points, and the tightening straps (above right) are easier to operate than some of the competition. The seat did bounce a little and wouldn't stay firmly against the vehicle seat in one of the test vehicles, but not the other two.

The red lever on the base adjust the angle of the base to one of...
The red lever on the base adjust the angle of the base to one of five options to help parents find the right angle for installation.
The level on the Ultra is located on the base and helps the...
The level on the Ultra is located on the base and helps the installer find the right installation angle for a properly installed seat.

The Ultra offers an adjustable foot base (above left)to help find the right installation angle based on the level (above right) guidelines on the side of the base.

Britax B-Safe Ultra infant car seat - the seatbelt path for installing the base using your vehicle belt is...
The seatbelt path for installing the base using your vehicle belt is large and unobstructed, though not color-coded like some of the higher-end competition.
Credit: Abriah Wofford

Ease of Install - Belt


Installing the B-Safe Ultra is easier using the vehicle belt and the final connection feels more stable than when using LATCH.

Britax B-Safe Ultra infant car seat - while the belt lock-off on the ultra is built-in, it isn't the...
While the belt lock-off on the Ultra is built-in, it isn't the easiest to use and in our tests, it didn't stop the base from traveling up the seat belt in at least one test vehicle.
Credit: Abriah Wofford

The Ultra has a lock-off that works well and is similar to the lock-offs found on the other Britax seats we've reviewed. It isn't the best lock-off, and it can be challenging to thread the belt through the space. Once again, in one test vehicle (a Subaru Outback), it struggled to stay put and feel genuinely stable. The base can work its way up one side, and then the vehicle belt would tighten, preventing it from sitting flat again. This results in the need to start over.

Britax B-Safe Ultra infant car seat - installing the ultra with a vehicle belt offers a fairly secure...
Installing the Ultra with a vehicle belt offers a fairly secure connection to the vehicle using the European belt path that utilizes the lap and shoulder portions of the vehicle belt.
Credit: Abriah Wofford

Ease of Install - Without the Base


Installation of the Ultra without the base is also easier than using the LATCH method. This Britax has a European pathway that is not color-coded like some nicer competitors.

Installing the Ultra sans belt requires the use of the shoulder...
Installing the Ultra sans belt requires the use of the shoulder strap on the vehicle belt to be tucked into the belt clip on the back of the carrier.
The belt path on the Ultra for installing without the base is not...
The belt path on the Ultra for installing without the base is not color-coded, but it isn't a puzzle either.

This pathway utilizes the lap and shoulder parts of the vehicle belt to pull the carrier snuggly into the vehicle seat. In our opinion, this installation method feels more stable (with less movement) than the other two. We didn't need a towel or pool noodle to securely install the Ultra without the base.

Britax B-Safe Ultra infant car seat - the canopy on the ultra is nice looking and doesn't collide with the...
The canopy on the Ultra is nice looking and doesn't collide with the carrier handle, no matter which position they are both in.
Credit: Abriah Wofford

Ease of Use


The B-Safe Ultra performs about average for everyday ease of use compared to the competition.

Britax B-Safe Ultra infant car seat - the buckle an chest clip on the ultra are the same as other britax...
The buckle an chest clip on the Ultra are the same as other Britax options. While not the hardest to operate they do require some thumb strength.
Credit: Abriah Wofford

Harness


The Ultra's buckle is similar to other Britax buckles and operates smoothly without difficulty. The chest clip is also the same as other Britax options, with an easy-to-press release button and parts that slide together without skipping.

Britax B-Safe Ultra infant car seat - the ultra's harness tightening strap moves smoother than other...
The Ultra's harness tightening strap moves smoother than other Britax seats and the release button is easy to find on top of the padding and works well.
Credit: Abriah Wofford

To tighten the harness, the Ultra has a smoother strap that is easier to pull than previous models, and we like the easy-to-find and press release button. While the button sits on top of the padding and isn't hard to find, it also isn't soft enough for children to alter.

Britax B-Safe Ultra infant car seat - adjusting the ultra's shoulder strap height is a one-hand process...
Adjusting the Ultra's shoulder strap height is a one-hand process that operates smoothly by squeezing the two side together and moving the assembly up and down.
Credit: Abriah Wofford

The shoulder strap height is a non-rethread style adjustment where the headrest assembly moves up or down as needed. The clip on the back of the seat is easy to squeeze, and the assembly moves smoothly without a problem. The shoulder straps have six positions and the crotch strap has two, which is enough to ensure a secure fit for most babies.

Britax B-Safe Ultra infant car seat - the larger handle release buttons on the ultra are some of the...
The larger handle release buttons on the Ultra are some of the nicest in the bunch.
Credit: Abriah Wofford

Handle


The Ultra's handle has squeezable release levers on both sides where it connects to the carrier. Simultaneously squeezing the levers allows the handle to rotate to one of four possible positions. The levers are some of the best in the group with a larger size and smooth movement. The handle doesn't rub on the carrier or the canopy.

Britax B-Safe Ultra infant car seat - removing the ultra's carrier from the base is easy with the back of...
Removing the Ultra's carrier from the base is easy with the back of the carrier pull handle that releases the carrier from the base and then doubles as a handle.
Credit: Abriah Wofford

Carrier and Base Connection


Once the carrier is well aligned, it drops easily onto the base with an audible sound when it connects. Releasing the carrier from the base is also an easy process using the lever on the carrier's back.

Britax B-Safe Ultra infant car seat - the manual storage for the ultra is on the base, a location we find...
The manual storage for the Ultra is on the base, a location we find lacking as it leaves you without a manual should you travel sans base. This means you better practice installing the carrier without the base ahead of time since you won't have your manual to refer to.
Credit: Abriah Wofford

LATCH Anchor and Manual Storage


The LATCH connectors tuck under the base on each side. If properly stowed, they shouldn't impede the carrier base connection. The manual has a storage pocket on the top of the base, which isn't that convenient if you need to travel without the base and can't remember how to install the carrier sans base.

Britax B-Safe Ultra infant car seat - the ultra has a nice overall look but some of the fabric choices are...
The Ultra has a nice overall look but some of the fabric choices are disappointing.
Credit: Abriah Wofford

Comfort/Quality


The Ultra is the nicest Britax in the review with only slightly better than average quality and comfort than the competition. The padding is adequate and better than other Britax options, and the fabric looks nice, but the strange mesh material could snag and will collect gunk. We also worry it might chafe sensitive skin. The shell is nice but still not as sharp-looking as similarly priced options. The overall fit and finish are good for the price point, but we think some of the material choices are strange (we're looking at you gunk catching cover).

Britax B-Safe Ultra infant car seat - the ultra is one of the only options with a peek-a-boo window in the...
The Ultra is one of the only options with a peek-a-boo window in the canopy. This feature can come in handy when you use the carrier as part of a stroller car seat combo.
Credit: Abriah Wofford

The Ultra canopy is sharp-looking and is one of the few canopies in the review to include ventilation via a peek-a-boo window. While not absolutely necessary, a window and ventilation can be helpful if you use the carrier as part of a travel system with a stroller.

Britax B-Safe Ultra infant car seat - the ultra is also ultra on weight with one of the heaviest carrier...
The Ultra is also ultra on weight with one of the heaviest carrier weights in the group. This is not a good seat choice for those who plan to lug their carrier very far.
Credit: Abriah Wofford

Weight


This Britax weighs 11.61 lbs, making it one of the heaviest in the group and the heaviest Britax option in this review. As your everyday use includes lifting the carrier with a baby inside, the weight could be important to your decision-making process. However, unless you'll be carrying it for long distances, we recommend using weight as a tiebreaker instead of your number one priority.

Should You Buy the B-Safe Ultra?


This average car seat is not impressive compared to most of the competition. While we appreciate that some parents will be hoping to pair a Britax car seat with a Britax stroller, we think there are better options to be had in both categories.

What Other Infant Car Seat Should You Consider?


If you have your heart set on a Britax stroller, we prefer the Britax Endeavours car seat over the B-Safe Ultra and Britax B-Safe. However, we still think there are several options you should consider overall of these. The Chicco Keyfit 30 is a tester favorite and one we've recommended to more than one friend in recent years. This seat is compatible with most top-ranking strollers we've tested, has better crash test results, and is easy to install using LATCH. We like the Chicco KeyFit 35 for the same price as the Ultra. This is one of the top-scoring seats in the review, and it has better crash test results and is easier to install using LATCH.

Juliet Spurrier, MD & Wendy Schmitz

Honest, objective reviews. Led by a Pediatrician.

BabyGearLab was founded by a Pediatrician Mom with a mission to provide a reliable, independent, source of information to new parents. Our experts have tested thousands of baby and kids products to share key performance, health, and safety findings. We spend tens of thousands of dollars crash testing car seats to inform our ratings. And, we combine our review work with gobs of expert parenting advice. To assure complete independence, we buy all the products we test ourselves. No sponsored content. No ads. Just real, honest, side-by-side testing by people who care.

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