Polycarbonate lens, PVC frame. Comfortable. Lightweight. Indirect vents. CAT II, Conform to EN166:, Optical Class:1, BT - (Medium impact energy at extreme temperatures) , 2C-1.2 - UV Filter These goggles are treated with Crystal Coat (TM) , C-380M is a polysiloxane based thermal cure hardcoat that combines anti-fog performance with abrasion and chemical resistance.