The 31-80102 XC Frame Laser Safety Glasses by Honeywell (formerly Sperian) are for ND:YAG & Harmonics, CO2, Excimer, Diodes, and GaAs laser wavelengths. It has an XC frame with brown color polycarbonate lenses. Glendale's polymer Diffused Viewing Only (DVO) designed eyewear maximizes visibility, with lightweight frame designs while providing unsurpassed attenuation for the entire range of laser wavelengths. 35 % VLT (visible light transmission). The stylish XC (extra comfort and extra coverage) frame provides the best wrap around coverage for a spectacle and most comfort for the wearer. The lenses are coated for anti-fogging. The insert for prescription lenses is available free of charge by contacting Honeywell at 1-800-500-4739. Meets ANSI Z136.1, Z87+ (high impact) and EN207. CE Certified.