Deluxe 3-Year 21 ft. Round Blue Solar Pool Cover

The Deluxe 3-Year Round Blue Solar Cover Pool Blanket warms up your pool water by up to 10°. Made of polyethylene material . this solar cover floats bubble side down on the surface of your pool water when the pool is not in use . allowing solar energy to pass through and trap it as retained heat in the pool. This cover is Blue and made of 8 mil material that helps raise the water temperature by absorbing sunlight during the day and retaining the heat at night . thereby extending the pool season. Savings come from a reduction in water evaporation decreasing chemical consumption. Material is highly resistant to ultraviolet rays which inhibits deterioration. 3-year warranty.