1. SIZE COMPATIBILITY: You can get a rectangular pool cover with a tether for 221x150cm rectangular pools and similar shaped rectangular frame pools. 2. Durable PE material: Made of UV resistant thickened polyethylene woven fabric, suitable for all weather conditions. Lightweight, soft and durable, it won't leak, crack or damage. Really wear-resistant, long service life. It can also extend the life of the pool. 3. Drawstring design and dust-proof effect: Our pool cover adopts tie-down rope, so that it can be firmly fixed on the pool frame and prevent it from being blown away by the wind. It can also prevent fallen leaves, dust and debris from falling into the pool to accumulate, effectively keeping the pool water clean. 4. Breathable Design: There are ventilation holes on the surface of our cover. Water is easily spoiled in summer. With air holes, the water quality can be maintained for a longer time, and the falling water will not accumulate on the pool cover. 5. Heating and Insulation Effect: Covered with our protector and exposed to sunlight, the water in the pool heats up faster. The excellent insulation of PE material can also achieve the effect of heat preservation.