3M ™ Secure Fit ™ 3700 with amber PC lens and adjustable temples. Pressure Diffusion Temple technology (PDT) helps distribute pressure over the ears for a secure and comfortable fit. The Scotchgard ™ Anti-Fog Coating prevents the glasses from fogging for longer than usual anti-fog coatings and also contains an anti-scratch coating. Lens marking: 2C-1.2 1 FT KN.