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Britax Marathon 70 Convertible Car Seat, Onyx (Prior Model)

4.1 out of 5 stars 118 customer reviews

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About the product
  • Safe cell technology features safe cells 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, 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, Side impact protection comprised of deep side walls lined with energy-absorbing EPP foam distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body, Tangle-free; Five-point harness distributes crash forces across the strongest parts of the body and provides a secure fit
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Britax Marathon 70 Convertible Car Seat, Onyx (Prior Model)
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Add to Cart Add to Cart Add to Cart
Customer Rating 4 out of 5 stars (118) 4 out of 5 stars (560) 4 out of 5 stars (3851) 4 out of 5 stars (606)
Price Unavailable $272.00 $269.25 $224.99
Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Product Trends Group
Age Range Description Less than one year Less than 18 months Less than 18 months
Color Onyx Verve Matrix Matrix
Item Dimensions 18.5 x 21 x 26 in 18.5 x 23 x 23.5 in 22 x 25 x 19 in 21.5 x 20 x 24 in
Item Weight 18 lbs 28.4 lbs 20.94 lbs 23 lbs
Maximum Manufacturer Weight Recommended 70 lbs 65 lbs 100 lbs 120 lbs
Minimum Weight Recommended 5 lbs 5 lbs 20 lbs 4 lbs
Strap Type All in one All in one All in one

Product description

The Britax Marathon 70 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 Marathon 70 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 Marathon 70 also incorporates Britax side impact protection, offers a no-rethread and quick-adjust five-point harness, multiple buckle and recline adjustments, and an easy access cover and access to belt paths from the front of the seat. A head and body pillow is provided for comfort.

Product information

Technical Details
Item Weight18 pounds
Product Dimensions21 x 18.5 x 26 inches
Item model numberE9BB11A
Minimum weight recommendation5 Pounds
Maximum weight recommendation70 Pounds
Batteries requiredNo
Additional Information
Customer Reviews 4.1 out of 5 stars 118 customer reviews
Best Sellers Rank #89,214 in Baby (See top 100)
Shipping Weight22.4 pounds
Domestic Shipping Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
International Shipping This item is not eligible for international shipping. Learn More
Warranty & Support

Product Warranty: For warranty information about this product, please click here
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