The Graco Nautilus 65 harness booster car seat goes the distance: in a 5-point harness 10-30 kg (22-65 lb), high back booster 18-45 kg (40-100 lb), and backless booster 18-45 kg (40-100 lb) Features: -3 seats in 1: 5-point harnessed car seat 10-30 kg (22-65 lb) to highback belt-positioning booster 18-45 kg (40-100 lb), to backless belt-positioning booster 18-45 kg (40-100 lb) -Simply Safe Adjust Harness System adjusts the height of your harness and headrest in one motion, to ensure that your child is always properly secured -Steel-reinforced frame provides strength and durability for years of smart utility -3-position seat recline helps keep your growing child comfy -Adjust the headrest 5 different positions with 1 hand