Crews Frostbite 2 Safety Glasses With Indoor Outdoor lens has a black frame and scratch-resistant mirror lens that can be worn inside or outside. Frostbite 2 safety eye wear now sports a sleek frosted frame made of flexible lightweight material. All Frostbite 2 lenses are scratch-resistant and filter out 99.9 percent of UV radiation. Replace your current safety glasses with these glasses that can be worn inside without any issues as well as outside. Perfect set of safety eyewear for construction workers with ANSI Z87+ rating.