Our economy cover is built with features that covers costing much more don't include. The 'Bronze' cover has a tough no-rip material that will stand up to winter's worst and is U.V. stabilized, allowing it to last for years in direct sunlight. Super strong polyethylene thread and rugged tie-down loops means this cover will last. Black underside prevents algae growth. Backed by a 6-Year Warranty – 1-YEAR FULL-RATED!