The RetraxPRO MX not only provides rugged protection for your truck bed it also provides a low-profile design that enhances the appearance of your truck. The compact storage container features a unique spiral track system that prevents the cover from coming into contact with itself as it opens and closes. The operation of this cover allows it to always stay flush to the rails and creates a dependable seal to help keep the elements out and protect your cargo. The heavy-duty aluminum construction provides the strength, durability, and security for lifetime ownership.