Aquabuddy Solar Swimming Pool Cover 7M X 4M Reducing the water evaporation, pool cover is always the best mate for the pool. Our durable and UVresistant pool cover can really do the job well. With the Lowdensity polyethylene (LDPE) and 400 micron which can distribute the heat to the water efficiently and effectively, our pool cover can increase the temperature in the water as well as can significantly reduce water evaporation. It can keep the pool clean too. Note: The pool cover is made of 3 pieces of smaller sized pool covers.