Meets or exceeds the military's stringent MIL-DTL-43511D (goggles) and MIL-PRF-31013 (spectacles) ballistic standards Wiley X ANSI approved frames can accommodate prescription safety lenses up to +6.00/-6.00 Total Power Meets and exceeds ANSI Z87.1-2003 high velocity impact safety and optical standards Matte black frames Includes 2 sets of lenses, Smoke Gray and Clear Smoke Gray lenses provide maximum glare reduction, won't distort colors and are excellent in bright/glare conditions, light transmission: 15% Clear lenses offer maximum light transmission, see precise color values, great for hazy or overcast, dusk/dawn conditions, light transmission 89%