A solar blanket is a great investment for every pool owner. In fact, in some areas of the country, a good quality solar blanket may be all you need to warm your pool water and make your pool more enjoyable. Features:. Solar blankets will increase pool water temperature by 10 to 15 degrees (or more in season). Significantly reduces heating costs by up to 80%. Superior heat absorption and retention. Reduces evaporation, saving water and costly . Extends swimming season by up to 6 weeks. Solar blankets are made from a durable polymer material with thousands of tiny sealed air bubbles. They float "bubble side down" on the surface of your pool water when the pool is not in use, and allow solar energy to pass through, which is then trapped as retained heat in the pool. 8mm thickness. Made in the USA. Solar reel not included Dimensions: 18' diameter. Material(s): polyethylene Note: photo displays a rectangular solar cover that has been custom cut by a customer to fit their pool. This listing is for round solar cover.