The Summit High Back Booster Car Seat by Safety 1st provides a safer ride and is fully loaded with ease-of-use features that parents will appreciate. The 4-position QuickFit™ headrest adjusts without the need for rethreading and the 5-point safety harness adjusts easily right from the front of the seat. The pivoting armrests on the booster make getting in and out of the car seat easy, and your child will love the convenient cup holder built right into the side of the car seat that gives them a neat place to store a drink or snack while on the road.