CoverMates - Semi-Custom SIZE: Up to 18' - Select Collection - 4 YR Warranty- Grey WARRANTY: 5-year manufacturer warranty MATERIAL: Made with 300D stockdyed polyester with silicon water repellent coating FEATURES: Elastic Hem with 4 tie down loops in each corner for extra security. Covered center grommet for optional cable lock. Double needle stitched seams with rot resistant thread. USE: Designed to withstand exposure to weather conditions including sun, rain and snow. BONUS: Includes Free storage bag.