Cosco High Back Booster Car Seat The High Back Booster from Cosco is a sensational seat designed with comfort and safety in mind. It is a combination high back/belt positioning booster seat. It secures a child 22-80 lbs. Like other Cosco car seats it is LATCH equipped for easy installation and for use with the 5-point harness only. The booster child seat has several standout features which helps separate it from the pack. The LATCH system is one of the safest ways to install a car seat. L