Part of the Wiley X Tactical Goggle Series, the Ballistic SG-1 is Military Tough. The interchangeable smoke and clear lenses are made of Wiley X's Shatterproof Selenite lens material. T-Shell and Foil lens coatings provide excellent scratch and fog resistance. The ultra-flexible frame will fit a variety of face sizes. And the low profile design is compatible with Night Vision Goggles (NVG) and helmets. Removable temple arms allow the SG-1 to be worn as a goggle or converted to glasses. Made tough for military and law enforcement, but also an excellent option for any intense outdoor activity. ANSI Z87.1-2015 certified.