Keep water and heat in and debris, leaves, and trash out of your pool with the Bestway Solar Pool Cover. Above ground swimming, solar pool covers create a greenhouse effect in your pool. Solar covers also prevent water evaporation caused by dry winds or free‑chlorine loss caused by UV rays. These covers are designed to keep water and heat in, but debris out. Extend your swimming session with a Bestway Solar Pool Cover. Fits 18" / 5.49m Fast Set, 16" / 4.88m Power Steel and 15" / 4.57m Steel Pro Pools. Features: Fits 15', 16' & 18' Steel Pro Pools All-new durable material The solar cover utilizes solar energy to warm the pool water and prevents heat from escaping Solar cover can be adjusted to fit pool size Specifications: Size: 16-18 ft Colour: Blue Material: PE Brand: Bestway Style: Pool Cover Safety Warning: Not a safety cover. Adult supervision is recommended at all times when children are around pools. Box Includes: Bestway Flowclear Blue Solar Pool Cover, 16-18ft