The legendary Britax Marathon™ convertible car seat is renowned for safety, comfort, and convenience. The Marathon is also one of many Britax products renowned for its ability to keep your child in a harnessed restraint up to 65 pounds.

The legendary Britax Marathon™ convertible car seat is renowned for safety, comfort, and convenience. The Marathon is also one of many Britax products renowned for its ability to keep your child in a harnessed restraint up to 65 pounds. Short description