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Britax Boulevard 70 CS Convertible Car Seat - Onyx

  • By:

  • $339.99
  • $169.98
  • Ship-To-Home
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  • Gift wrap is not available for this item.

  • Product is not available for shipping internationally. (Details)

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Product Description

The BRITAX BOULEVARD 70 CS convertible car seat is designed for children rear facing from 5 to 40 pounds and forward facing from 1 year and 20 lbs up to 70 pounds. The BOULEVARD 70 CS achieves revolutionary head safety through the use of BRITAX SafeCell Technology, integrated steel bars, and Versa-Tether that work together to minimize head excursion and reduce the risk of head injury during a frontal impact. The BOULEVARD 70 CS also incorporates BRITAX True Side Impact Protection, a Click & Safe Snug Harness Indicator, and HUGS. An easy access cover and access to belt paths from the front of the seat make it easier to install. It is also equipped with a five-point, no-rethread and quick-adjust harness, multiple buckle and recline adjustments, and a body pillow for comfort.


  • SafeCell Technology features SafeCells designed to compress in a crash, significantly lowering the center of gravity and counteracting the forward rotation of the child seat which normally propels the child toward the front seat
  • Click & Safe Snug Harness Indicator is an audible aid that provides extra assurance when the harness is within range of appropriate snugness
  • Integrated Steel Bars strengthen the connection to the vehicle and reduce forward flexing of the child seat during a crash
  • Energy-Absorbing Versa-Tether features a staged-release tether webbing to slow the forward movement, reducing the crash forces reaching the child, and a two-point attachment to minimize forward rotation while anchoring the top of the child seat
  • True Side Impact Protection offers a head restraint creating an extra layer of energy-absorbing EPP foam, keeping the head, neck and spine ?in true? or aligned, and deep side walls lined with EPP foam to distribute crash forces

Additional Info





21 x 18.5 x 26



22.8 pounds

29.4 x 19.2 x 18.2

How to Get It

  • This item can be shipped to the entire United States including Alaska, Hawaii, and all U.S. territories including Puerto Rico
  • This item can also be shipped to APO/FPO addresses and to P.O. Boxes in all 50 states
  • Due to shipping restrictions, Ship Charges will be separate from other items in your order
  • This item will ship by itself

  • This item may be shipped via Standard Shipping, Expedited Shipping or Express Shipping
  • Please Note: Some addresses are eligible for Standard Shipping only (APO/FPO, P.O. Boxes, U.S. Territories and Puerto Rico)

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  • This item is sold online only (not sold in stores)
  • Orders placed for Store Pickup will receive online pricing and promotions
  • In-stock status is approximate and may not reflect recent sales
  • Not all items are carried at all stores. Please click the "Select a store" link to check product availability

Customer Reviews Summary & Ask a question

Average Customer Rating:

by PowerReviews
Britax Boulevard 70 CS Convertible Car Seat - Onyx

(based on 2 reviews)

Ratings Distribution

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Reviewed by 2 customers

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(1 of 1 customers found this review helpful)


Very Happy!!

By Dee

from New york

About Me First Time Parent

Verified Buyer


  • Comfortable
  • Safe
  • Sturdy
  • Stylish


    Best Uses

    • Infants

    Comments about Britax Boulevard 70 CS Convertible Car Seat - Onyx:

    We bought this car seat for our second car. We have the advocate in our other car and roundabout in my mother's car. We are comfortable with the britax brand and feel they are superior quality. Even though this was a pricey car seat, we like the addtional head support. When we were in the BRU the salesman suggested this car seat. The only problem I have had in general, not with this seat yet, but my other ones is that the straps twist and they are very difficult to fix. I wish there was something that would prevent this from happening.

    Comment on this review

    (6 of 6 customers found this review helpful)


    In a crash - no problems

    By Katie

    from St. Louis, MO

    About Me First Time Parent


    • Comfortable
    • Easy to Adjust
    • Easy to install
    • Safe
    • Sturdy
    • Stylish


      Best Uses

      • Infants

      Comments about Britax Boulevard 70 CS Convertible Car Seat - Onyx:

      My husband and I along with our 9 month old daughter were rear-ended by a van who was going about 25 miles per hour on a exit ramp. It rocked us pretty hard and there was significant damage to our bumper and trunk. We had installed this carseat about 3 weeks before the crash as our daughter is pretty tall for her age and she wasn't fitting in her infant Graco seat any longer. Our daughter didn't sustain any injuries or even red marks or bruises because of this carseat and the carseat itself held up great - no sign of damage. The insurance company is going to replace it anyway as part of the highway and traffic policy, and we bought another one for our Chevy Malibu. After the accident we were glad we spent the extra money on this seat. My husband easily installed the seat in 10 minutes. In our Chevy Malibu, it's a little difficult to get her in the seat now that it's rear facing, but in a few months when we turn her around I think it will be much easier. She often snoozes in the seat now so she must be comfortable!

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