Britax Marathon 70 Convertible Car Seat, Onyx


Customer Rating : Rating: 4.5
Price : $215.00
Britax Marathon 70 Convertible Car Seat, Onyx

Product Description

The Britax Marathon Convertible Car Seat 70 for children rear facing 5-40 lbs trained and forward facing from 1 year and 20 lbs to 70 lbs. The marathon reached 70 cooperate revolutionary head security through the use of Britax Safe Cell Technology, integrated steel bars, and Versa-Tether, the, to minimize head excursion and the risk of head injuries in a frontal collision. The Britax Marathon 70 also includes side-impact protection, offers a non-threading and quickly adjustable five-point harness, buckle and multiple reclining position adjustment, and easy access, and access to trails cover band from the front of the seat. A head and body pad for comfort is provided.

Amazon.com Product Description


  • Safe technology provides secure cell designed to compress upon impact, significantly reducing the counteracting gravity forward rotation of the child seat, which usually drives the child to the front seat
  • Integrated steel bars to reinforce the link between the vehicle and reduce the child seat moves forward in a crash
  • Energy absorbing versa Tether features a staged-release tether strap to slow the forward movement, reducing the impact forces reaching the child, and a two-point fixing to minimize at forward rotation and simultaneously anchoring the tip of the child seat
  • Side impact protection from the deep side walls lined with energy absorbing EPP foam covered distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body
  • Without the wires, five-point harness distributes crash forces over the strongest parts of the body and provides a secure grip





Britax Infant Positioning Insert


Customer Rating : Rating: 4.7
Price : $11.99
Britax Infant Positioning Insert

Product Description

The Britax Infant Positioning may be necessary for small children to achieve a good fit of the harness for your child. The Infant Positioning has been tested and certified for use with the following Britax Convertible seats: ROUNDABOUT 55, Marathon 70, Boulevard 70, Boulevard 70 CS 70 CS, and Advocate.


  • May be necessary for small children, a good fit of the harness to reach your child
  • Sled tested and certified for use with the following Britax Convertible seats: gyro 55, Marathon 70, Boulevard 70 Boulevard 70 CS, 70 CS Lawyer
  • For use with infants with a weight between 5 and 11 pounds





Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx


Customer Rating : Rating: 4.5
Price : $169.99
Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx

Product Description

Amazon.com Product Description


  • The Britax roundabout convertible car seat for 55 children rear facing 5-40 lbs trained in the same direction and up to � 55
  • Safe Cell properties safe cells adapted to compress upon impact, to reduce significantly the center of gravity counteracting forward rotation of the child seat, the child usually drives to the front seat
  • Integrated steel bars to reinforce the link between the vehicle and reduce the child seat moves forward in a crash
  • Side Impact Protection with deep side walls lined with energy absorbing EPP foam covered distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body





Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx


Customer Rating : Rating: 4.5
Price : $169.99
Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx

Product Description

Amazon.com Product Description


  • The Britax roundabout convertible car seat for 55 children rear facing 5-40 lbs trained in the same direction and up to � 55
  • Safe Cell properties safe cells adapted to compress upon impact, to reduce significantly the center of gravity counteracting forward rotation of the child seat, the child usually drives to the front seat
  • Integrated steel bars to reinforce the link between the vehicle and reduce the child seat moves forward in a crash
  • Side Impact Protection with deep side walls lined with energy absorbing EPP foam covered distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body





Britax Roundabout 55 Cover Set, Onyx


Customer Rating : Rating: 5.0
Price : $44.99
Britax Roundabout 55 Cover Set, Onyx

Product Description

The Onyx lid has a subtle black and white plaid, blocked with a black soft touch fabric. This piece of jewelry is a popular choice in the Britax lineup for those who have a gender-neutral fabric option. This cover set includes the cover, body pillow, belly pad and two comfort pads. The fabric content for the surface of the cover made of 100% polyester.


  • This cover fits the Britax roundabout Set 55
  • The cover set includes the cover, body pillow, belly pad and two comfort pads
  • The fabric content for the surface of the cover of 100% polyester





Britax Marathon 70 Convertible Car Seat, Onyx


Customer Rating : Rating: 4.5
Price : $210.99
Britax Marathon 70 Convertible Car Seat, Onyx

Product Description

The Britax Marathon Convertible Car Seat 70 for children rear facing 5-40 lbs trained and forward facing from 1 year and 20 lbs to 70 lbs. The marathon reached 70 cooperate revolutionary head security through the use of Britax Safe Cell Technology, integrated steel bars, and Versa-Tether, the, to minimize head excursion and the risk of head injuries in a frontal collision. The Britax Marathon 70 also includes side-impact protection, offers a non-threading and quickly adjustable five-point harness, buckle and multiple reclining position adjustment, and easy access, and access to trails cover band from the front of the seat. A head and body pad for comfort is provided.


  • Safe technology provides secure cell designed to compress upon impact, significantly reducing the counteracting gravity forward rotation of the child seat, which usually drives the child to the front seat
  • Integrated steel bars to reinforce the link between the vehicle and reduce the child seat moves forward in a crash
  • Energy absorbing versa Tether features a staged-release tether strap to slow the forward movement, reducing the impact forces reaching the child, and a two-point fixing to minimize at forward rotation and simultaneously anchoring the tip of the child seat
  • Side impact protection from the deep side walls lined with energy absorbing EPP foam covered distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body
  • Without the wires, five-point harness distributes crash forces over the strongest parts of the body and provides a secure grip





Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx


Customer Rating :
Rating: 4.5

List Price : $199.99 Price : $181.98
Britax Roundabout 55 Convertible Car Seat (Previous Version), Onyx

Product Description

Amazon.com Product Description


  • The Britax roundabout convertible car seat for 55 children rear facing 5-40 lbs trained in the same direction and up to � 55
  • Safe Cell properties safe cells adapted to compress upon impact, to reduce significantly the center of gravity counteracting forward rotation of the child seat, the child usually drives to the front seat
  • Integrated steel bars to reinforce the link between the vehicle and reduce the child seat moves forward in a crash
  • Side Impact Protection with deep side walls lined with energy absorbing EPP foam covered distributes crash forces, shields from vehicle intrusion, and contains the head, neck and body