The Code 4 Series safety glasses are ergonomically dimensioned for a 3 point fit, the ultimate in comfort. Comes in a Black Frame with Smoke Lens.• Exceeds ANSI Z87.1-2003 safety standards Provides maximum UV protection Ribbed non-slip rubber nose cushion Contoured temple tips Hinge stops to prevent scratched lenses Polycarbonate safety glasses protect your eyes from impact, but the glasses deteriorate due to scratches, light, etc., and should be replaced after 2 years.