This premium above ground winter pool cover is ticker and more durable than the regular edition, making it suitable for harsh winter conditions. It is made of laminated polyethylene sheeting woven with thick, high-density polyethylene stitching, which ensures superior tensile strength and durability. It has also been treated to provide maximum resistance to damaging sunrays. This winter cover includes 3 feet of overlap (1.5 feet on all sides), making it easier to install. You can rest assured that come next spring your pool will be ready for another season of family fun! This winterizing pool cover will keep debris and water out of your pool. It features a lightweight design and comes with perimeter grommets, steel cable and winch for easy installation. Cover dimensions: 15' x 21' to fit a 12' x 18' oval aboveground pool.