Transfers solar heat into your pool while preventing heat from escaping Can gradually raise water temperature by up to 15 degrees Easy to cut with scissors to fit kidney, oval or irregularly shaped pools 3-Year Limited Warranty Extend your swimming season and slash your pool heating bills with this 8 mil solar blanket. It features thousands of tiny air pockets which capture heat from the sun and transfer it to your pool water while also acting as insulators to prevent the heat you've gained from escaping. This blanket will also reduce chemical loss through evaporation, saving you money! Easy to cut with scissors to fit kidney, oval or irregularly shaped pools. 3 year warranty.