3-in-1 harness booster helps protect your child, from toddler to youth Grows with your child from forward-facing harness (22-65 lb) to highback booster (40-100 lb) to backless booster (40-100 lb) No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion 3-position recline helps keep your growing child comfy One-hand, 5-position adjustable headrest grows with your child