Skullerz THOR Anti-Scratch/Enhanced Anti-Fog Safety Glasses, Black Nylon Impact Frame, Indoor/Outdoor Polycarbonate Lens Durable nylon full-frame design bends and flexes without breaking. Enhanced anti-fog Fog-Off+ technology features improved anti-fog performance vs original Fog-Off. Enhanced scratch resistance for improved durability. Impact-resistant. Lens filters 99.9 percent of harmful UVA, UVB and UVC rays to keep eyes safe in the sun. Rubber temples keep the glasses secure and prevent slipping.