The RetraxOne MX is a retractable polycarbonate series bed cover constructed from a one piece sheet of polycarbonate, engineered to retract without joints or hinges. The RetraxOne MX combines strong, durable polycarbonate with an incredible scratch resistant matte finish. The rigid polycarbonate construction provides superior impact resistance and UV protection allowing the cover to perform in extreme temperatures ranging from -50F to +200F degrees. The low profile design gives the RetraxOne MX tonneau cover an overall streamline appearance. The RetraxOne MX optimizes cargo capacity with the cover open or closed, providing the ultimate versatility in cargo management. The RetraxONE MX is key lockable at any position giving you unlimited flexibility in your hauling capacity. If you have any questions about RetraxOne MX tonneau covers give us a call at 800-272-5362.