This is a premium-grade solid winter pool cover. Solid pool covers do not allow water to pass through their material. This pool cover features a premium-grade 14 x 14 scrim. The premium-grade polyethylene material used for this cover weighs 5.2 oz./yd2. Both the scrim count and material weight are the best indicators of the strength and durability for your pool cover. A pool cover with a extremely high scrim count and a heavy material, like this one, will last longer than any other pool cover. This is a premium-grade pool cover designed to protect your pool from all winter elements. This pool cover has a black underside. This pool cover includes a perimeter binding. Please order by your pool size, as the overlap goes beyond the pool size listed. This cover includes a five-foot overlap. Please order a larger size cover if you have steps (or any other irregularity) protruding from your pool. Water tube loops are placed around the perimeter of the pool cover. Water tubes sold separately. Only water tubes should be used to install this pool cover. No other method of installation is recommended. This cover should be able to comfortably float on the pool water without excessive stress. This cover is not meant to be used as a debris cover during the swimming season. This winter pool cover is intended to be used during the off-season. Includes a twenty year warranty.