Stay Safer Longer with the KeyFit® 30, accommodating infants from 4 to 30 lbs – the #1-rated infant car seat of greater than 22 lb capacity infant seats! One-pull harness tightening and loosening in the car seat allow for quick fitting, and the thickly-padded infant insert gives extra support for a smaller baby around the head, neck, back and bottom. The shell is lined with energy absorbing foam, and the vehicle base features an innovative LATCH management system,