The #1 rated infant car seat in America. The ReclineSure Spring-loaded Leveling Foot helps achieve a proper base angle in a wide range of vehicles. Includes RideRight Bubble-level indicators on both sides of the seat to show when a proper fit has been achieved. Secure the base with the SuperCinch One-pull LATCH Tightener which uses force-multiplying technology to attain a tight and secure fit. Seat interior is lined with Energy-Absorbing foam for improved side-impact protection. Secures baby from 4 to 30 lbs. FAA approved.