From the makers of the No.1-rated KeyFit, NextFit, and IIHS Best Bet KidFit, the Chicco GoFit Backless Booster is designed for big kid comfort with a contoured ErgoBoost seat and double foam padding that provide support in all the right places. This Booster Seat must be installed in a vehicle seat with a 3-pointseat belt (shoulder belt and lap belt).NEVER use lap belt only. The GoFit is equipped with integrated lap belt guides and a shoulder belt clip to help position the vehicle seat belt for proper use. A built-in carry handle makes it easy to transfer from vehicle to vehicle, and a smooth underside helps protect vehicle seats from damage. Two integrated CupFolders easily flex and fold out of the way to save space. For parent convenience, they are easy to remove and dishwasher-safe. All fabrics are also removable and machine-washable, including the pop-out arm rest covers. For big kids 4y plus from 40-110 lbs and 38-57". ErgoBoost contoured seat with double foam padding. Removable, machine-washable seat pad and armrest covers. 2 hide-away CupFolders are removable and dishwasher-safe. Built-in carry handle makes it easy to transfer from vehicle to vehicle. Smooth underside helps protect vehicle seats from damage.