Features and Benefits:Fog-Free. All Day Comfort.;Lasting Fog-Free Lenses;Comfortable Temple Arms - Extended Wear;Lens Resist Scratching;Flexible Nose Bridge for Better Fit;Gray lenses for transitioning between indoor and outdoor applications;ANSI Z87.1+;CSA Z94.3;Third Party Tested;Limited Life Time Warranty;The MILWAUKEE® Fog-Free Safety Glasses are designed for all day comfort. This protective eyewear has fog-free lenses, so they stay clear in the toughest conditions with a lens coating to reduce scratching. The safety glasses have comfortable temple arms designed for extended wear. These fog-free protective glasses also have an integrated flexible nose bridge that provides more comfort. The gray lenses are best for transitioning between indoor and outdoor work.