3-in-1 harness booster helps protect your child, from toddler to youth Grows with your child from forward-facing harness (26.5-65 lb) to highback booster (40-100 lb*) to backless booster (40-100 lb) *To continue to meet industry standards, we have increased the weight minimum from 30 to 40 lb No-Rethread Simply Safe Adjust Harness System allows the headrest and harness to adjust together in one motion Lightweight, portable seat is ideal for busy, active parents One-hand, 9-position adjustable headrest grows with your child