Blue Wave NS510 14-mil Solar Blanket for Rectangular In-Ground Pools, 12-ft x 24-ft, Clear CONSERVES ENERGY  This 14-mil blanket covers your swimming pool and employs solar heating to increase the water temperature by up to 15 degrees Fahrenheit. MINIMIZES HEAT LOSS: Our insulating thermal bubbles provide effective heating all summer long. This blanket is packed with innovative cells ensuring your swimming pool stays warm through cool nights and cloudy days. SUPERIOR DURABILITY - This Rectangular 14-mil Solar Blanket for in-ground swimming pools is designed to withstand deterioration caused by ultraviolet rays and chemicals. REDUCE EVAPORATION: Prevent up to 95% of pool water and chemical evaporation with the use of a solar blanket. This reduction of evaporation is not only environmentally friendly, it will save you time and money, as well. 6-YEAR WARRANTY - Your product comes with a 6-year manufacturer warranty.