10 Years 1 Car Seat - From birth to booster (4-120 lb.) it's all you will need. Grows with your child with ultimate protection on every road trip. Complete with 4 modes in 1 seat! SafePlus Engineering - Allows for rear-facing up to 50 lb., with 3 modes of newborn protection, and 2-in-1 anti-rebound bar and calf support to reduce rebound rotation. Fits 3-Across - Our famous slim-fit design with SafePlus 8-layer side impact protection and zero compromises to safety, space, or comfort. Reinforced Automotive Grade High-Strength Steel Core - Complete with multi-position calf support, our unique core shell shields and protects your child. Convenience & Comfort - One hand easy-adjust 12-position headrest and memory foam, washable seat cover for busy families on the go.