DESC: The Marathon from Britax is a durable, convertible car seat that helps keep your child safe and secure in the car. Ideal for parents seeking premium comfort and a higher, forward-facing harnessed weight capacity, the Marathon fits children rear facing from five to 35 pounds and children forward facing from at least one year old and 20 pounds, up to 65 pounds. Both positions can accommodate a standing height up to 49 inches.