With the Safety 1st onSide air Convertible Car Seat, you can keep your child rear-facing longer than other seats allow. Its revolutionary technology provides increased protection around baby"s head, where it"s needed most. Safety 1st - onSide air Convertible Car Seat, Livingston:?Rear Facing: for children over 1 year old, from 5-40 lbs and 19" to 40" tall?Forward Facing: for children over 1 year old, from 22-40 lbs and 34" to 43" tall?Air Impact Technology provides immediate side-impact reduction?4 harness heights?3 buckle locations?Product weight is 10 lbs