Cap a 10 ft. round above-ground splash pool, spa bowl, or inground plunge pool with a 15 mil heavy-duty blue PE solar pool cover that raises water temperature by 8 to 15 C (14 to 27 F) under sun and cuts evaporation by up to 95 percent. The 15 mil thickness is the heavy-duty end of the consumer-grade spec, a real upgrade over 8 mil and 12 mil covers that tear at the seam within two swim seasons under UV and wind drag. The closed bubble structure floats on the water surface, sealing the pool against evaporation and locking in the heat the sun drops into the water during the day, and the cover also keeps leaves, dust, pollen, and bird droppings out of the water through the off-hours, a real reduction in vacuum time and chlorine shock use. The trim-to-fit PE body cuts cleanly with scissors or a utility knife, so the 10 ft. (3.05 m) round spec adapts to any irregular shape, rock-ledge edge, or corner cutaway on a custom pool. Heat retention overnight is the quieter savings: the cover cuts heat loss through the water surface, lowering gas heater run time across the swim season and pushing opening day earlier, closing day later. Use with chlorine under 2.5 ppm and pH above 7.2 for full material life. Net 6.97 lbs. (3.16 kg). Fit for round above-ground and small inground residential pools and spa bowls.