Save water bill and solar heating film. Use the power of the sun to heat the water so you can swim by heating the water earlier or keeping it warm after bathing. 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, strong and durable, waterproof and tear resistant< /li> Dustproof These pool covers fit snugly over the top of the pool to prevent leaves, dust and debris from accumulating in the swimming pool Wide Use This round swimming pool cover fits for swimming The pool will be perfectly cleaned and prevents leaves, dust, debris, etc. from entering the pool. prevents them from falling into the pool and keeps the pool clean. At the same time, it reduces water evaporation, saves water and saves money. Easy to assemble This round swimming pool cover is easy to open and fasten with the included rope. Easy to install and easy to start. Note: The data is all measured manually,