The Robelle Premier Winter Cover is a premium quality, UV-resistant polyethylene solid winter cover for in-ground pools. This cover includes five feet of overlap, which will give you ample material to cover your pool. Please order by pool size, as the overlap goes beyond the pool size listed. Please order a larger size cover if you have steps (or any other irregularity) protruding from your pool. The top of this cover is slate blue, and the bottom side is black to prevent algae growth. Includes a heavy-duty binding around the entire perimeter of the cover. The Robelle Premier Winter Cover features a premium quality 12 x 12 scrim. This cover is constructed with a premium quality polyethylene material that weighs 3.26 oz./yard2. Both the scrim count and material weight are good indicators of the strength of your pool cover. A cover with a higher scrim count and heavier material, like the Robelle Premier Winter Cover, will last longer than inferior covers. Premium quality water bag loops are placed every four feet. Grommets at all four corners. The Robelle Premier Winter Cover includes a fifteen-year warranty.