TruGuard, Over The Spectacle, Safety Glasses, Clear Lens With Anti-Fog & Scratch Resistant Lenses, Fits Over Most Prescription Glasses, Temples Extend From The Brow Bar To Avoid Interference With Prescription Frame's Temples, Dielectric Frame Design, 99% Protection From Harmful UV Rays, Meets ANSI Z87 Plus & CSA Z94.3 Standards.