SHOOTING GLASSES SLINGS® model are Lab Certified for Ballistics Rated, Safety rated,Violet/Purple Violet/Purple-Vermilion 2.3mm polycarbonate, anti-fog lenses are hard coated,meets Military Standards MIL-STD 662 & MIL-PRF-31013-32432 ANSI Z87.1 2010 for maximum protection. A comfortable streamlined fit depending on the contours of the face with our latest development of “Panascopic” tilt and “Telescopic” capable temples adjustments. Optional RX Carrier Available. The lens Enhances and improves detail green and blue light backgrounds