SKU: 59367897620
britax 3 across

britax 3 across Britax Allegiance 3 Stage Convertible Car Seat

Sale price$19.46 Regular price$21.62
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USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 15 - Sep 20

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Description

britax 3 across Britax Allegiance 3 Stage Convertible Car SeatThe Britax Allegiance is safe and comfy for your little one while youre on the go. Britax SafeCell Impact Protection is a system of patented safety features that provide advanced protection. A foam lined shell provides side impact protection in the event of a crash. Plus, installation is easy using lower anchors that lock into place with a click and are released with the push of a button. Specifications ClickTight Installation System is safe and

The Britax Allegiance is safe and comfy for your little one while you’re on the go. Britax SafeCell Impact Protection is a system of patented safety features that provide advanced protection. A foam-lined shell provides side impact protection in the event of a crash. Plus, installation is easy using lower anchors that lock into place with a click and are released with the push of a button.

 

Specifications
  • ClickTight Installation System is safe and simple to use. Open the front of the car seat, feed the seatbelt through the indicated path, buckle and click the seat shut.
  • 3 layers of side impact protection, formed by a deep energy-absorbing shell, quick-adjust head protection and side cushions, absorb energy and shield your child from the most severe type of collision.
  • SafeCell Impact Protection includes a steel frame, energy-absorbing base and patented V-shaped tether.
  • Impact-absorbing base compresses to reduce the force of a collision.
  • Impact-stabilizing steel frame offers superior strength where you need it most: at the connection point to the vehicle.
  • Patented V-shaped tether minimizes seat rotation with a unique two-strap design and staged-release stitches that slow and reduce forward movement during a crash.
  • Click & Safe Snug Harness Indicator gives an audible “click” to aid you in the proper tightening of your child’s harness.
  • Quick-adjust 14-position harness and 2-position buckle allows you to easily move the harness upward and buckle outward for a comfortable, secure fit as your child grows.
  • 7-position recline with automatic level indicator adjusts for proper recline rear-facing or for comfort and the best vehicle fit forward-facing.
  • Plush foam padding and fabrics for premium comfort.
  • Easy-buckle system keeps buckles and straps out of your way when positioning your child.
  • Easy-remove cover for cleaning without having to uninstall the car seat or remove the harness.
  • Suitable for children 5-65 lbs.
  • 1-Year Limited Warranty.

Dimensions & Weight

  • 20.5" W x 23.5" H x 23" D
  • 30.6 lbs.
  • Child Weight Rear-Facing: 5 - 40 lbs.
  • Child Weight Forward-Facing: 20 - 65 lbs.
  • Child Height: up to 49"
  • Harness Slot Heights: 8.35 to 19.4"

Britax strongly recommends that children ride rear-facing to the highest weight or height specified.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 59367897620

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4.3 ★★★★★
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L
lbrobe
New York, US
★★★★★ 5
It works!
I tried these on my teenage son who has pretty yellow teeth after braces. You can’t really tell in pics but in person they made a difference. He hasn’t had any odd side effects or sore gums from using them and said they were easy to use. He wears them for the recommended amount of time although started lower the first time to make sure he wasn’t allergic or anything. But so far great product and we are happy with it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 1, 2026
S
Sammy Squirrel
Louisville, US
★★★★★ 4
Work about as well as drugstore brands.
These are at least as good as the national brands at a fraction of the cost. They stick on easily and used as directed will whiten your teeth a few shades over the course of treatment.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 5, 2025
S
Verified Purchase
Sharon T.
Charlottesville, US
★★★★★ 2
Combersom
Cumbersome, does not hold 3nough water
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
M
Miah Quesada
Lake Worth, US
★★★★★ 3
Mixed Results
These strips fit comfortably and don’t slide around, which I appreciated. They are gentle on my gums and enamel, and I noticed a slight improvement in brightness after consistent use. That said, they aren’t as strong as some other whitening strips on the market, so if you’re looking for dramatic results you may be underwhelmed. Good for subtle whitening.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 2, 2025
D
Disappointed Reader
Carnegie, US
★★★★★ 5
Does work well for removing minor stains
This product is probably best for removing minor staining - things like coffee, tea, red wine. I don't think it would work for longer-term stains that accumulate with age - the strips are not powerful enough for that. Very easy to use: just apply and leave on for half an hour or until you can feel that they are no longer well-attached. The "cleaning" process starts immediately - you can see the bubbles form. I am a tea drinker, and I notice immediate effect after putting these on. Don't expect miracles, but they will help with fresh stains for sure. For me, they do not increase the sensitivity, but my teeth are generally not sensitive. But they are peroxide based, so the possibility is always there that it could have that side effect.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 1, 2025

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