The 38 Special Series safety glasses feature shatter-resistant polycarbonate lenses that provide the ultimate in impact and ultraviolet protection. Comes in a Black Frame and Smoke Lens. Exceeds ANSI Z87.1 -2003 safety standards Ergonomic contoured temples w/ pressure pads Precision frame w/ matte black finish Polycarbonate safety glasses protect your eyes from impact, but the glasses deteriorate due to scratches, light, etc., and should be replaced after 2 years.