Extend your swimming season and keep your pool warmer with this rectangle solar pool cover, engineered with thousands of tiny bubbles that collect heat from sunlight. Over about 5 to 7 days of consistent sun, it can raise your pool water temperature by roughly 14 to 27 degrees Fahrenheit, helping maintain pleasant temperatures on cool summer nights, though results vary with your environment. Beyond warmth, the solar blanket keeps water cleaner by blocking dust, leaves, and other debris, and it prevents about 95% of water and chemical evaporation to reduce waste and help extend the life of your pool; simply keep the bubble side facing down. Built from high-quality 12-mil PE, the cover is sun-proof, anti-tear, anti-aging, and non-toxic, with strong weather resistance for extended outdoor use. It suits above-ground and in-ground pools of many shapes, including rectangle, round, square, and irregular layouts, and you can trim it to a custom fit with a pen and scissors. Available in sizes from 12 ft x 24 ft up to 20 ft x 40 ft, it folds up and stores in the included carry bag with handles when not in use. Picture stepping into pleasantly warm water in the morning while spending less time skimming leaves and topping off the water. Color: Blue.