The Evenflo Advanced Protection Series 3 in 1 Combination Seat, Mercury features an innovative design allowing you to transition the seat between 3 different modes of use. This seat can be used as a harness booster, high back booster, and a no back booster. Sure Safe Installation equipped with Quick Connectors and a set of Latch Guides for a safe and quick installation. 3 layers of comfort-each layer is designed to support kids as they grown while alleviating pressure point buildup. 65 lbs. Internal Harness Weight Rating keeps your child in a 5 point harness longer and 110 lbs. Booster mode weight rating accommodates growing children longer. Machine washable cars seat pad keeps the seat looking clean. Dual cup holders for convenience.