Convertible Britax Marathon convertible car seat 70 maximum safety of the head by a combination of cell technology BRITAX safe, integrated steel bars and Versa-Tether, to minimize the deviation of the head and to cooperate, the risk of head injuries in a frontal collision. It also provides easy installation, side protection and innovative details for the child's comfort and safety. Headquarters are in the situation of children facing the rear with a weight of 5 to 40 pounds and children forward facing from the first year of life and 20 kg to 70 kg. MARATHON 70 (Onyx) Convertible Car SeatAt brief: Age / Weight Requirements: The position at the back, suitable for children weighing 50 to 40 pounds forward facing suitable for children 1 + years old, weighing from 20 to 70 poundsWarranty 1 - year limited warranty Available in (left to right): Onyx, Crimson, Waverly, Cowmoofla ..