Take on a gamut of changing conditions and activities with just one pair of versatile eyewear 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 Patented removable Facial Cavity Seal blocks out wind, debris and peripheral light Includes two 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 Clear lenses offer maximum light transmission, see precise color values, great for hazy or overcast, dusk/dawn conditions