12 months & up. This standard Starr seat is a bus only car seat. It has a five-point, add-on restraint system that easily adjusts to provide a proper, secure fit for children 25 to 65lbs, up to 57" tall and over 1 year of age. Features: Wraps around any size bus seat with the universal cam wrap system, Installs on both standard FMVSS 222 and 210 seats, buckle loop feature helps to avoid touch-related issues, meets or exceeds all applicable federal, state, and Head Start safety standards, seat pad can be removed and washed without removal of the seat, and optional chest strap provides additional upper torso support and adjusts for a comfortable, secure fit. Installation does not require use of school bus seats with lap or lap-shoulder belts.