Designed for children 30 to 100 lbs, and between 38 -57 inches tall. The patented folding feature takes moving the seat from car to car and storing in the trunk to a new level of convenience. Deluxe padding will keep your child comfortable and content, even on long trips. The back support stays fully enclosed as the height is adjusted. This means side support and protection in every position. The head rest has a full EPP foam liner to absorb energy in an impact. And the deeper side wings provide additional protection for your child.