【Save on water bill and solar heating cover】 Use the power of the sun to heat the water so you can swim by heating the water earlier or keeping the water warm after swimming. It helps prevent up to 90% of pool water evaporation when the pool is not in use. Waterproof pool cover: The pool cover is made of high-quality waterproof polyethylene material, strong and durable, waterproof and tear-resistant. 【Dustproof】 These pool covers fit snugly over the top of the pool to prevent leaves, dust, and dirt from accumulating in the pool. 【Widely used】 This round pool cover fits snugly over the pool, preventing leaves, dust, trash, etc. from falling into the pool, keeping the pool clean. At the same time, it reduces water evaporation, saves water and saves money. 【Easy to Install】This round pool cover can be easily opened and fixed with the provided rope. Simple to install and easy to get started. 【Multiple Styles】210D Multiple shapes and sizes of pool covers to choose from.