10 Years One Car Seat - from Birth to Booster (5 - 120 lb) it's all you will need. Grows with your child, ultimate protection on every road trip. 4 modes in 1 seat! Rear Facing for Longer - lovingly engineered to keep your child rear-facing up to 50 lb. Fits 3-Across - our famous slim-fit design with zero compromises to safety, space, or comfort. Mechanically engineered from reinforced automotive grade high-strength steel, our unique core shell shields and protects your child. High-quality ComfortPlus Memory Foam, always included. The original and only all-in-one convertible car seat that folds for travel or compact storage. FAA approved for airline use.