Innovative lightweight dielectric safety glasses with metal free hinges, featuring a tough and modern design with dual material on the side arms Side holes offer increased ventilation for optimum comfort Materials Nylon Standards EN 166 1 FT EN 170 2C-1.2 (clear) EN 172 5-3.1 (smoke) ANSI/ISEA Z87.1 .1 (CLEAR) ANSI/ISEA Z87.1 .1 U6 L3 (SMOKE)