Blue Wave NS488 12-mil Solar Blanket for Round Above-Ground Pools, 28-ft, Clear REDUCES HEATING COSTS - Keep your swimming pool warm through cool summer nights and cloudy days. Our thermal cell technology employs insulating bubbles to retain warmth for effective warming even when the sun isnt shining. EFFICIENT AND EFFECTIVE - Magni-Clear solar blankets quickly and efficiently increase pool temperatures by up to 15 degrees Fahrenheit. The clear blankets allow more sun light to reach the pool depths for a thorough heating that surpasses comparable Intex pool covers. UV-PROTECTED - This Round 12-mil Solar Blanket for above-ground swimming pools is created to withstand exposure to UV radiation. It will hold up under intense sunlight for years. 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. 5-YEAR WARRANTY - Your product comes with a 5-year manufacturer warranty.