Safety Glasses, Yellow/black frame with clear lens. Anti-scratch coating (optidur NCH coating). Lenses coated with uvex optidur NCH . They are highly scratch-resistant and also highly resistant to chemicals. The coating system features nanotechnology, which significantly increases the non-stick properties of the lens, making it easier to clean. As a result, waterbased stains and oil spills are easily removable. One of the best-selling models of safety glasses in the world, with integrated side protection. Thanks to the multiple adjustment options, these glasses can take any fit. Uvex duo-flex springs adjustable in four positions. The lens is easy to change and clean.