Arctic Armor Bronze 30 ft Round Winter Cover is a great choice for any above ground pool, protecting it from the elements during its winter slumber, making Spring opening much easier and hassle-free. Its durable woven polyethylene construction is unaffected by years of exposure to wind, rain, snow and even the sun, thanks to its advanced UV shielding. As if that wasn't enough, this cover has a black underside that prevents light exposure, eliminating the threat of algae growth. Best of all, Arctic Armor Bronze 30 ft Round Winter Cover is backed by an 8 year warranty, allowing you to buy with confidence.