A pool solar cover is essential to your swimming pool. Not only will it generate free heat from the Sun but also slow down heat loss and help reduce evaporation. As the Sun's rays pass through the cover, heat generated is trapped by the bubbles on the underside of the cover which in some cases can result in as much as 5 - 8 degrees centigrade+ temperature rise, a sunny day will of course help to achieve this. This solar cover allows a build up of free heat from the Sun during the day and it will also act like a blanket to keep heat loss at a minimum overnight.Thickness: 16 milColor: BlueSize: 6x6 FT Tips: Cutting your pool cover to fit the shape of your pool is easy to do, you just need to follow the lines you draw and cut with scissors.Useful Tips for your Solar BlanketBubble side goes down! The sunlight seems to get focused by these bubbles like lots of little magnifying glasses.DO NOT use the cover after shocking the pool. High concentrations of chlorine can damage it, shortage the poolcover life time.When in extended periods of time on no use ( Winter or Hot part of summer ) Let cover dry, roll / fold up cover andstore in cool dry place. Cover it when on a reel.These covers should be completely removed from the pool before swimmers enter the water.DO NOT leave the cover on grass or other plants. It will burn them up.