The Atlas 65 2-in-1 harness booster car seat is designed to grow with your child as a harness booster from 22 to 65 pounds to a high back booster 30 to 100 pounds. The ultra-easy Simply Safe Adjust Harness System adjusts the harness and headrest together – with no time-consuming rethreading – to 10 height positions, making it simple to keep your child properly positioned. It features a handy harness storage compartment, which allows you to keep the harness with the seat, even when you’ve transitioned to high back booster mode. It features dual cupholders and a machine washable seat pad, buckle cover and harness covers. Care and Maintenance: Machine-washable seat cushion. Metal and plastic parts may be cleaned with mild soap and cool water. Buckle may be cleaned with a damp cloth Damp Cloth. Harness straps may be spot cleaned. Recommended Age Range: See weight/height range Child Occupancy Max: 1 Weight Range: 22-65 lbs with 5-Point Harness, 30-100 lbs as High back Booster Height Range: 27″-49″ with 5-Point Harness, 38″-57″ as High back Booster.