From the makers of the No 1-rated KeyFit and NextFit, the IIHS Best Bet Chicco KidFit Belt-Positioning Booster is designed with 10 positions of DuoGuard protection for the way kids grow. With height adjustment from the waist—instead of at the neck—the KidFit offers both head and torso protection throughout every stage. The KidFit is equipped with premium LATCH connectors and a SuperCinch one-pull tightener to stabilize the seat for easy in/out and keep it secured when unoccupied. Belt guides make it easy to position the vehicle seat belt and side wings are lined with EPS energy-absorbing foam. A contoured ErgoBoost seat with double foam padding provides comfort and support in all the right places, and a 2-position backrest adjusts to mimic the vehicle seat position. The backrest is also removable to create a backless booster for older children. Two dishwasher-safe Cup holders hide away when empty and are easy to remove for cleaning. All fabrics, including armrest covers, are removable and machine-washable. For big kids 4y+ from 40-100 lbs in High-Back Mode, 40-110 lbs in Backless Mode, and 38-57inch.