Material - Thermal Blanket. Thermal Blanket consists of closed cell, cross-linked P.E. foam sandwiched between two sheets of woven UV stabilised polyethylene film. Duokote colours: Sky blue, royal blue, grey, black . A very reputable supplier with whom we have had a long-standing relationship manufactures Duokote in Sydney. They are ISO 9002 registered ( Regn. number 6943). The cover is edge bound to protect the edging. The cover is sewn using a twin needle machine to give a double stitch. Duokote's durability make it the preferred option for schools and commercial applications Application The p.e. film is u.v. stabilised and formulated specifically for the harsh pool environment Flotation booms are sewn into one or both ends of the cover for ease of pull out and pull in. Pull out ropes will be supplied. Duokote has a 3 year warranty Life expectancy is estimated at 8 years. The life of the cover will depend on physical treatment and chemical balances.