Features and Benefits:High Impact. Fog-Free Lenses.;Military Grade Impact Protection;Lasting Fog-Free Lenses;Lens Resist Scratching;Comfortable Temple Arms - Extended Wear;Gray lenses for transitioning between indoor and outdoor applications;ANSI Z87.1+;CSA Z94.3;MIL-PRF-32432 Ballistic Impact Fragmentation - Class 1;Third Party Tested;The MILWAUKEE® Performance Safety Glasses are designed with High Impact, Fog-Free Lenses. This protective eyewear passes a high-velocity impact test, for lenses with military-grade impact protection. The protective glasses have fog-free lenses, so they stay clear in the toughest conditions and are coated to reduce scratching. The gray lenses are best for working in indoor and outdoor applications.