Made of premium low density polyethylene 400 Micron, this solar pool cover is extremely durable and can efficiently and effectively distribute heat throughout the water. It allows sun heat to penetrate to the pool; increasing the temperature in the water as well as can significantly reducing water evaporation. Also, it helps in keeping the pool clean; reducing maintenance time and cost for filtration and pumping. Maintaining your swimming pool will no longer be expensive. Get the best of natural resources and save money on chemicals and water!