Pronto Booster Car Seat Teardrop Accommodates children both big and small With the Cosco Pronto booster car seat teardrop, you don't have to worry about buckles and belts and snaps. This high back booster is equipped with a belt positioning feature so you buckle in your child safely and securely. So if your child is between 30 to 100 lbs. and 34 to 57 tall, this booster car seat is ready to carry your child safely. And if your child isn't too keen on the high back, when she reaches 40 lbs. up to 100lbs and 43-57H, the booster seat can become backless by simply removing the high back. As your child grows, the Pronto booster car seat teardrop features an adjustable headrest to keep her riding in comfort all the way up to 57 in. tall and 100 lbs. For added convenience, this booster seat even includes a slide-out cup holder and snack holder. This is a great feature for those long car trips or when running errands around town.