DETAILS Swimming Pool Winter Cool Covers Silver Pro Oval (15 YEAR) Protect your above ground swimming pool with the Silver Pro solid winter pool cover. The polyethylene material, which does not allow water to pass through, is constructed with a 12x12 scrim (threads per square inch). Covers with a higher scrim will have a better overall quality, strength, and durability. The material weighs 3.28 ounces per square yard which is important because heavier covers will be affected less b…