SecureFit™ 3700 K overlay safety glasses. - optical class 1 - adjustable temples - Pressure Diffusion Temple (PDT) technology helps to evenly distribute pressure over the ear to increase wearer comfort - Anti-scratch coating - a coating that increases scratch resistance (K) - like typical sunglasses, the gray lenses are popular in outdoor daytime work environments - ultraviolet protection filter - provide protection against small splashes of solid objects with an impact energy of up to 45 m/s (FT) - designation of the lens coating: 2C-1.2 3M 1 FT K - meet the requirements of standards EN166 and EN170