* It is designed to grow with a child for up to 10 years of use, from 4 to 120 pounds. * The seat transitions from a rear-facing infant seat to a forward-facing 5-point harness seat, a high-back booster, and a backless booster. * It features a 10-position headrest and Simply Safe Adjust Harness System, allowing the harness and headrest to be adjusted together without rethreading. ...