Chicco KeyFit Car Seat Base: Features an innovative LATCH management system with easy belt routing and a spring-loaded leveling foot Centrally located tightening strap makes tightening the LATCH attachment simple on the Chicco infant car seat base Wide belt routing loops with a built-in belt locking system means no more locking clips Spring-loaded leveling foot and easy-to-read bubble, level guides on both sides of the base Underside of Chicco infant car seat base is enclosed to prevent damage to vehicle seats Chicco infant car seat base conforms to FMVSS 213