8 Years One Booster - for your big kid from 40 - 120 lb. It's all you will ever need. Easy-adjust - 7-position headrest that grows up with your child. Engineered for safety and comfort with 2 layers of Side Impact Protection. Built for comfort for every size - our backrest has deep padded cushioning. Our contoured premium soft fabrics - with layered foam padding that provide comfort and support can be easily removed for machine washing. Open loop belt guides - easy access to seatbelt buckle help your big kid with self buckling - don't forget to check though! Easy, quick and secure installation - engineered with automotive steel rigid LATCH connectors allow you to secure the booster to your vehicle.