Blue Wave NS120 8-mil Solar Blanket for Round Above-Ground Pools, 24-ft, Blue RETAINS HEAT - Insulating thermal cells trap heat and retain warmth on cool cloudy days allowing you to swim in warmer water all summer long. LONG-LASTING - Created with UV-protected polymer, our solar blankets are resistant to the deterioration caused by chemicals and UV radiation. EXTENDS THE SEASON - This high-quality 8-mil solar blanket uses passive heating to raise your swimming pools temperature by up to 15 degrees Fahrenheit. 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. 3-YEAR WARRANTY - Your product comes with a 3-year manufacturer warranty.