Stretch the swimming season and skip the heater bill with this 8 ft round 12 mil solar pool cover that captures sunlight by day and locks heat in at night. The bubble-textured Pe cover prevents leaves and debris from contaminating the water, while reducing evaporation by up to 95 percent so you refill less often. Lightweight construction makes daily on-and-off practical, and the cover trims to fit oddly shaped pools easily.