GYMAX Pool Cover, 16 FT x 32 FT/18 FT x 36 FT/20 FT x 40FT 12-mil Solar Pool Cover with Carry BagMaintain Pool Warmth: Thousands of bubbles will work together to absorb sunlight and store heat, raising water temperature up to 14 27F. At the same time, the hot tub bubble cover prevents pool water from evaporating up to 95%, less water to use and more joyful time to play. Keep Your Pool Clean: The heat retaining pool blanket would also make your pool as clean as you just fill it. This thermal solar would protect your swimming pool from dust and