8 Years One Booster - for your big kid from 40 - 120 lb. It's all you will ever need. Two built-in elastic cup holders - perfect for road trip, drinks and snacks. Our contoured premium soft fabrics - with layered foam padding that provide comfort and support and can be easily removed for machine washing. Shoulder belt positioner - helps to properly position the vehicle seat shoulder belt, and easy access to seatbelt buckle help your big kid with self buckling - don't forget to check though! This lightweight booster is safely and securely installed - using the vehicle seat belt, making it easier to remove for storage in the trunk when not in use.