Sun2Solar 20-Foot-by-40-Foot Rectangle Clear Solar Cover | 16 Mil | Heating Blanket for in-Ground and Above-Ground Swimming Pools SAVE ON HEATING COSTS - Sun2Solar clear solar blankets are made from a film of thousands of tiny bubbles, which work together to collect and retain heat in your pool at night and on those chilly days. The clear color allows the suns UV rays to penetrate deeper into your swimming pool for warmer water temperatures. Pay less and swim more. MINIMIZE WATER EVAPORATION - The use of a solar cover helps in preventing up to 95% of pool water evaporation. When not enjoying a refreshing swim, keeping your pool covered lessens the vast amount of water lost into the environment. Fill up your swimming pool less and enjoy it more! HEAT RETENTION - After everyone has called it a day with wrinkled fingers from too much fun in the sun, make sure to place this solar cover back atop the water. Dont lose all of that warmth generated throughout the day when the sun sets. Assure your pools temperature does not drop too much by protecting it at night through use of a solar blanket. JUMP INTO WARMTH - Show friends and family your bravery by jumping in without the standard toe dip. Enter the swimming pool confidently knowing the Sun2Solar solar cover has kept the water warm just for you. Its easy to put on and take off allowing more time for showing off. TRIM TO FIT - Your pool may be uniquely shaped and getting the right fit is as easy as finding a marker and sharp pair of scissors. Have the bubbles facing down to the water and trace a line on the cover showing where you should cut off the additional material. Do so confidently knowing this wont affect the manufacturers warranty---they understand.