Thermoplastic rubber (TPR) duct hose is made from thermoplastic rubber reinforced with a spring steel wire helix. Thermoplastic rubber is a class of copolymer that possess both thermoplastic and elastomer properties, generally made from a mix of plastic and rubber. Its thermoplastic rubber material gives this hose great chemical resistance and also provides a longer life in extreme hot and cold environments over standard rubber. Its thermoplastic composition also provides excellent moisture, UV, and ozone protection to this chemical resistant hose. Since thermoplastic rubber hose fares well in both extreme hot and cold environments, the chemical resistant hose is often preferred over the use of other rubber duct hoses.