These heavy duty covers are constructed from 600-denier polyester with polyurethane coating providing UV protection and water resistance The vent guard system allows the cover to breathe, reducing moisture build-up The aluminum coated heat shields allow the cover to be used when the bike is hot, and the windshield area features a non-abrasive material to prevent scratching Elastic hems and web tie-downs The X-large cover features a hook-and-loop slot in the rear for easy access to luggage and to accommodate dual antennas