This entry level cover has the strength and durability of covers costing twice as much. Rugged polyethylene scrim and coating means this cover can withstand winter's worst. Arctic Armor covers are U.V. protected so they will last for years in direct sunlight. The cover's black underside retards algae growth and heat sealed seams means a crystal clear pool next spring. The big four foot overlap ensures a proper fit and helps the cover from stretching and ripping like covers with three foot overlaps. The Bronze cover is held secure on your pool with a heavy duty vinyl coated cable and tightener that is anchored by rip proof metal grommets. This cover is backed by an eight-year warranty (one-year full rated) and is navy blue with a black underside.