Blue PE Solar Pool Cover, 16 mil PE Bubble Film What it does Retains heat: the bubble structure captures and transfers solar energy during daylight, helping to maintain swimming water temperature. For performance place the bubble surface down when in use. Reduces evaporation: can reduce pool water evaporation by up to 95 percent, helping preserve water and reduce the frequency of refilling. Keeps the pool clean: blocks dirt, leaves, insects and other debris when the pool is not in use, reducing manual cleaning time. Key features Material and thickness: made from 16 mil thick polyethylene bubble film for a lightweight yet sturdy cover. Durable and reusable: tear resistant and color stable for repeated outdoor use. Easy to trim: the cover can be cut to fit any pool shape, including rectangular, square, round and irregular designs. Recommended sizing: allow an extra 50 cm (20 inches) beyond the pool edge to ensure full coverage. Simple to use: lay the cover on the water surface with the bubble side down; remove and store when . Compatibility Designed for inground pools of all shapes and sizes; suitable where a flexible, solar cover is needed. Practical applications Daytime heat retention: leave the cover on during sunny hours to capture solar energy and help maintain comfortable water temperature for evening swimming. Between swims and overnight: cover the pool between uses to keep debris out and reduce evaporation, so the pool stays cleaner longer. Seasonal or temporary protection: use the cover during periods of low use to limit water loss and simplify reopening the pool. Note Place the bubble surface down when using. For coverage cut the cover so it is about 50 cm larger than the pool perimeter.