The Vevor solar pool cover is designed to help keep pool water warmer for longer by absorbing sunlight during the day and retaining heat overnight. Its 12 mil bubble construction and PE material provide durable outdoor performance for regular seasonal use. The cover can be trimmed to fit irregular pool shapes and helps reduce water evaporation by up to 95%. It also helps keep leaves, dust, and small debris out of the pool. Lightweight construction makes it easier to handle and store when not in use.