Muscle Racer BedLet your child race into dreams with the Muscle Racer Car Bed where American muscle meets childhood imagination. Rev up bedtime with the ultimate blend of muscle and imagination. The Muscle Car Bed brings the bold spirit of classic American performance into your childs room turning every night into a ride to remember. Included with Your Purchase: This bed does not include a mattress. It is designed to fit a standard US Twin size mattress (38 x 75).