The system that converts from a highchair to an infant feeding booster to a toddler booster to a youth chair. They are quick easy change from Highchair to infant feeding booster and back. The chair with the conveniences Graco has to offer so you can relax and enjoy meals with your baby. They include one removable seat back insert with 3 point harness which can be used interchangeably with toddler booster or youth chair. 6 Position height adjust allows your baby to sit with you at the table for special meals or every day.