The Britax Marathon ClickTight Convertible Car Seat is an excellent choice for getting your family where they need to go safely, comfortably and with so much ease. With our ClickTight installation system, now everyone can install the car seat securely and confidently by just buckling the seat belt. Plus, complete side impact protection shields your little one in a deep protective shell designed to absorb crash forces and protect from debris. Accommodates rear facing 5-40 lbs and and front facing 20-65 lbs.