In The Swim Premium Pool Solar Blanket Cover 12 Mil is our most popular solar cover that we carry. Using a pool solar cover has many advantages that will help save you time and money. Our solar blanket covers are made from a light-weight, yet durable polyethylene material. They are easy to install by cutting the cover to the shape of your pool with scissors if it is irregularly shaped. In The Swim Premium Pool Solar Blanket Cover 12 Mil will help heat your water temperature up to 8-10 degrees in approximately 5-7 days of consistent sunlight. Using a pool solar blanket cover prevents the water from losing heat which will help let you enjoy your swim season even longer. It reduces water evaporation, chemical loss, and the amount of debris that can get in the water.