Bubble covers are made from commercial grade 525 micron PE (Ppolyethylene) translucent blue bubble UltraDome™ material, allowing maximum transmission of warming solar radiation into the pool water while also efficiently insulating against heat escaping. In an outdoor pool, it can warm the water by up to 8ºC. It has an R- value (thermal resistance) of 0.067m2/K, thermal conductivity of 0.080 W/mK and a weight of 460g/m2. It comes complete with full edge binding and end reinforcing, cords, flotation rod, multi point attachment and an attached over cover to protect your investment when on the roller. A floating haul cord is supplied to enable ease of operation. If wind is a problem the blankets can be fitted with wind skirts at additional cost. Covered by a manufactures 5 year pro-rata warranty. Exact pool measurements, roller attachment points and any intrusions into the water will need to be supplied prior to manufacture.