This is a Commercial-Grade solid winter pool cover. Solid pool covers do not allow water to pass through their material. This pool cover features a Commercial-Grade 12 x 12 scrim. The Commercial-Grade polyethylene material used for this cover weighs 3.7 oz./yd2. Both the scrim count and material weight are the best indicators of the strength and durability for your pool cover. This is a Commercial-Grade pool cover designed to protect your pool from the 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 four-foot overlap. If you have a very large top rail, please consider a larger pool size. 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. This cover is meant for traditional above ground pools with a traditional top rail. Includes a winch and cable that should be used to secure your pool cover through the grommets around the perimeter of the p