The Big Kid DLX booster car seats offer a 2-in-1 design that allows them to transition from a high-back booster car seat to a no-back booster car seat. The one-hand full body adjustment allows the seat to be positioned at 6 different heights for a correct fit. Along with the pivoting armrests, the dual cup holders will keep drinks and snacks close. Give your child the comfort and protection they deserve with Evenflo booster car seats. Appropriate for children 3 years and older. Protecting children is our core mission at Evenflo. For almost a century we have been a leader in safety, innovation and education. Knowing that one in four automobile accidents are side impact collisions, we believe it"s important to go beyond the current government standards when designing the next generation of Evenflo car seats, including the Big Kid DLX . Side impact tested. Meets or exceeds all applicable federal safety standards and Evenflo"s side impact test standard designed and tested for structural integrity at energy levels approximately 2X the federal crash test standard Easy. One-hand, 6-position height adjustment 2 seats in 1. Removable back for easy transition to a no-back booster. Safety - includes energy-absorbing foam activity lights - allow the child to read and color during evening commutes (3-AAA batteries required for each side. Batteries not included). Dual, integrated cup holders for snacks and drinks. Pad removes for machine-washing.