Skullerz Loki Safety Glasses are designed to be worn as regular sunglasses or as safety goggles by removing the temples and attaching the elastic strap and removable foam gasket for a dust-beating seal (both included). Tough, scratch-resistant lens filters 99.9 percent of harmful UVA, UVB and UVC rays to keep your eyes safe in the sun. Protective, work safety sunglasses are military tested and ANSI Compliant. Smoke Fog-off Lens is ideal for outdoors and bright light. Permanent, anti-fog treatment delivers fog-free viewing at all times and will not wash or wear off. Durable, nylon frames bend and flex without breaking. Nonslip, rubber nose piece and rubber temples keep the glasses secure and resist sweat. Frame width is 144mm.