Our bronze 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 weather. Arctic armor winter covers are u. V. Protected so they will last for years in direct sunlight. The cover's black underside prevents algae growth and heat sealed seams means a crystal clear pool next spring. The big 4 foot overlap ensures a proper fit and helps the cover from stretching and ripping like covers with 3 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 spaced 30 inches apart. This cover is navy blue with a black underside.