The Evenflo® Chase® LX Harnessed Booster features an innovative headrest design that allows the vehicle belt to self-adjust to your child’s 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. Converts from a 5-point harness booster for use 30 - 40 lb, to a high-back booster with vehicle seat belt for use up to 100 lb. ranging from 40 - 100 lb. This combination booster provides an exceptional value for a seat with such a wide array of innovative features.At Evenflo, we go above and beyond government standards to create car seats that are safe. The Chase LX Harnessed Booster Car Seat meets or exceeds all applicable federal safety standards. In addition to federally required testing, it is structural integrity tested, rollover tested and temperature tested. If you need help installing your car seat, our ParentLink® Consumer Care Team offers help online in real time. Get live video support with a certified car seat safety technician to assist with proper vehicle installation, so you can drive with confidence. Families have trusted Evenflo for more than 100 years for smart, innovative gear designed to make life easier, safer and more comfortable at home and on the go. Let us help you save time and find peace of mind, so you can focus on what matters most: your child.