impact protection for the way kids grow. With height adjustment from the waist-instead of at the neck-the KidFit Zip offers both head and shoulder protection throughout every stage. The KidFit Zip is equipped with premium LATCH connectors and a Super Cinch 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 for improved impact protection. A contoured ErgoBoost Plus seat with triple 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. The KidFit Zip also includes bonus seat/backrest cushions that easily zip on to provide extra padding and protect the fabrics underneath. They're just as easy to zip off for cleaning or storage. All fabrics, including armrest covers, are removable and machine-washable. Two dishwasher-safe CupFolders hide away when empty and are easy to remove for cleaning. A bonus storage console fits into either CupFolder to carry big kid necessities. For big kids 4y+ from 30-100 lbs in High-Back Mode, 40-110 lbs in Backless Mode, and 38-57".