Bestway 24ft rectangular frame solar pool cover is simply laid out on the water's surface when a 24ft rectangular frame pool isn't being used, providing insulation and forming an effective barrier to falling leaves, beetles practising their breaststroke and outdoor debris. The swimming pool solar cover leaves a slight gap around the edges of a 24ft rectangular frame solar pool, which is standard fare and allows space for the water to breathe. It's made from a durable material that looks exactly like bubble cushion and it's these tiny air bubbles that provide such fantastic insulation. They help the pool solar cover insulate a pool by absorbing solar energy, storing it and using it to warm the water. Specifications: size: 24 ftcolour: bluebrand: bestway style: pool cover model name: 24' rectangular solar pool coversafety warning: not a safety cover. Adult supervision is recommended at all times when children are around poolspackage includes: bestway flowclear 24' solar pool cover, blue