Fits Head Sizes: M-L. Changeable lens capability allows maximum light condition versatility. Shatterproof lenses block 100% of UV rays. Meets GL-PD 10-12 MCEP standard, superseding MIL-PRF-31013 ballistic standard. Certified to ANSI Z87.1-2003 high impact and optical performance standard. Rated as OSHA grade occupational protective eyewear. Meets US Military specifications as combat protective eyewear.