The Chicco Key Fit has a large weight range for infants ranging from 4 to 22 pounds, letting you get the most out of the seat. It features an innovative latch management system, with easy belt routing and a spring loaded leveling foot to make this infant car seat the easiest car seat to install. The one pull centrally located tightening strap has made tightening the latch attachment simple. Its wide belt routing loops with a built in belt locking system means no more locking clips. Leveling the seat is easy with a spring loaded leveling foot and easy to read bubble, level guides on both sides of the base.  The underside of base is enclosed to prevent damage to vehicle seats. The 5-point harness has an easy one pull tightening and loosening for a quick and accurate harness fit.  The thickly padded infant insert gives extra support for a smaller baby around the head, neck, back and bottom. The carrier shell is lined with energy absorbing foam for improved impact protection. A retractable canopy gives added shade. This conforms to FMVSS 213. The Key Fit easily transfers from car to stroller in seconds and is compatible with the Chicco C1, Cortina, Trevi and S3 strollers.