GUARD ADVANCEDINCLUDED: GREY CLEAR RUST LENSES Protection that you can see! Our Wiley X GUARD ADVANCED is one of the lowest profile frames in our changeable lens series. WX GUARD ADVANCED meets the MIL PRF 32432 ballistic safety standards for impacts and optical quality. We are constantly improving our products, but with the WX GUARD ADVANCED, we took an already solid pair of glasses and made a few tweaks to make them even better. At a lower price point, these