The Thermex™ is an advanced double lensed goggle with TMC™ technology that offers fog-free use, even in extremes of temperatures. The Thermex™ features an out lens made from polycarbonate with an inner lens made from acetate. 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, molton metal and extreme temperature protection. Also offers 99.9% protection against UV radiation.