The newest addition to Britax's line of high-quality boosters, the Parkway does not have seat width adjustment but will accomodate a wider range of heights and weights (38 to 60 inches and 30 to 100 pounds). It also comes with built-in cup holders, and of course Britax's signature side-impact protection, with extensive side cushioning for the head and body and EPS foam in all parts of the seat. The cover is removable and machine washable, and the contoured base is stable and slip-resistant but will not damage your upholstery.