Protection that you can see. The Wiley X Guard Advanced Changeable Series Shooting Glasses are one of the lowest profile frames in the Changeable Series. WX GUARD ADVANCED meets the MIL-PRF-32432 ballistic safety standards for impacts and optical quality. Wiley X is constantly improving their products, but with the WX GUARD ADVANCED they took an already solid pair of glasses and made a few tweaks to make them even better. Style, comfort, and value. What else could you ask for?FeaturesShatterproof Selenite Polycarbonate lenses Meet the MIL-PRF-32432(GL) ballistic standardsANSI Z87.1 optical clarity and high mass/high velocity impact standards US Federal OSHA 1910.133(b)(1)(1) standards100% UVA/UVB protection with distortion free clarityT-Shell Lens coating resists scratchingDouble-injected rubber temples for non-slip comfortInterchangeable LensesTemple length 125mm, bridge size 18mm, lens width 76mmIncludes smoke gray and clear lens