The latest innovation in 3-in-1 car seat technology from Safety 1st, the brand that invented the 3-in-1 category. The Safety 1st grow and go ARB air features best in class air protect side impact technology. This 3-in-1 car seat is built to grow with your child and provide superior protection every step of the way! It gives your child a safer and more comfortable ride with extended use at each stage; the rear-facing position, forward facing, and as a booster seat. Rear-facing, the padded anti-rebound bar (ARB) adds an extra measure of safety by preventing the car seat from over-rotating in the event of a sudden stop or crash.