21' ROUND Winter Above Ground Pool Solid Cover, Arctic Armor (Plus 4 ft Overlap). 8 Year warranty. Our Arctic Armor above ground winter pool covers have the strength and durability of winter pool covers costing twice as much. Rugged polyethylene scrim and coating means this winter pool cover WILL withstand winter’s worst. Arctic Armor winter pool covers are U.V. protected so they will last for years in direct sunlight. Our winter pool cover’s black underside retards algae growth and ensures a proper fit, which means a crystal clear pool this spring. Our superior manufacturing process means our winter pool covers won't stretch and rip like OTHER winter pool covers. The Arctic Armor winter pool cover is held secure on your above ground pool with a heavy duty vinyl coated cable and tightener that is anchored by rip proof metal grommets. STRONG, LONG-LASTING WOVEN STRANDS. Arctic Armor covers are woven with strong/long-lasting polyethylene tapes to produce a cover that will hold up to winter's worst weather. NO MORE ALGAE GROWTH! Arctic Armor covers are constructed of an extremely tight weave fabric that does not allow light to pass through. Without sunlight, algae cannot grow! Standard Features: 8 Year warranty with 1 Year 100% coverage - 4 Foot Overlap - 12 x 12 Scrim - 2" Hi strength polypropylene binding - Triple Laminated Deluxe grade Winter Cover - Rip resistant woven polyethylene fiber - Above ground covers come with winch and plastic coated metal cable - UV inhibitor to protect cover against decaying sunlight - Double stitched hem with sewn-in polypropylene cord - Rust resistant metal grommets - Heat sealed seams - Woven with black UV resistant yarn to protect pools against sunlight and to prevent algae growth - Color: Navy Blue top and Black bottom - Shipping: This item normally ships within 3-5 days.