Polyair 2832121 Protech 21 Ft. Standard Solar Cover, Blue

These blue solar covers are made of 8-mil, U.V. protected material. Solar covers are a fantastic way to use free heat from the sun to warm your pool water during the day and prevent heat loss at night. They work by capturing and transmitting heat directly into your swimming pool while allowing for maximum sunlight absorption. The blue color of these solar blankets absorb a greater level of heat while retaining the heat already present in your water.

The blue color of these solar blankets absorb a greater level of heat while retaining the heat already present in your water.