The Kobuk booster seat can be used with or without the backrest, keeping your child safe after he or she out-grows a car seat. A vented shell, energy absorbing EPS, height adjustable backrest, armrests and removable cup holder make for a safe and comfortable environment for your child. Belt guides give you the freedom to adjust the seatbelt vertically or horizontally so you can find the perfect belt position for your child. Removable and washable fabric adds convenience.