The Thermex Double Lens Goggle is an advanced double lensed goggle with TMC technology that offers fog-free use, even in extremes of temperatures. The Thermex features an outer lens made from polycarbonate with an inner lens made from acetate. Features & Benefits: Double lens protection with TMC technology to offer fog-free use, even in extreme environments; Protection against medium energy high speed particles at 120 m/s (270mph) and protection against high-speed particles at extremes of temperature; The optical qualities of the lens comply with the requirements of optical class 1 (highest); Offers dust, liquid splash, molten metal, and extreme temperature protection; Also offers 99.9% protection against UV radiation; NBR foam on the goggle housing provides a comfortable fitting to a wide range of facial profiles; Can be used with an RX insert for prescription eyewear; Low profile design means the Thermex goggle can be worn with an industrial safety helmet or bumpcap, and is fully compatible with our Evolution range of safety helmets and our Hardcap A1+ baseball style bumpcaps; Thermex goggles feature a wide 30mm elastic headband for improved comfort and secure fit; K & N Class lens offering Anti-scratch & Anti-mist protection.