The Evenflo Chase LX Harnessed Booster features an innovative headrest design that allows the vehicle belt to self-adjust to your childs height while in booster mode. Enhanced side walls and head support provide comfort and safety for the child. Sporty style elements appeal to children, as will the integrated cup holders with flexible stripe design. The seat accommodates children ranging from 22-110 lbs. This combination booster provides an exceptional value for a seat with such a wide array of innovative features.