Monterey provides advanced booster safety and expands to fit a growing child up to 120 lbs. It features deep, reinforced sides lined with energy-absorbing EPS foam for side-impact protection. With the turn of a dial, the seatback width expands to fit a child's shoulders up to 20" wide and the headrest adjusts 6.5" to fit a child up to 63" tall. Integrated LATCH connectors and a one-pull front adjuster allow for a safe and secure installation in seconds. The seat bottom is reinforced and angled for anti-submarining performance and features thick AirTek™ foam for total comfort. Montereys extra-deep cup holders keep drinks upright, it packs flat for convenience and can also be used as a backless booster.