When autumn leaves start to change color, it's time to think about winterizing your swimming pool. The Winter Block 27 Foot Round Aboveground Winter Pool Cover is great for keeping your pool in good condition during the cold, winter months, and it will also make getting your pool back into shape in the spring much easier. This pool cover 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 beyond the pool size, 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 and the tightly woven 7 x 7 scrim makes it very durable for harsh winters. It features a lightweight design and comes with perimeter grommets, steel cable and winch for easy installation. Cover dimensions: 30 feet in diameter to fit round pools measuring 27 feet in diameter.