3M™ Secure Fit™ Safety Goggles (SF401AF) are innovative, patented technology goggles designed for maximum comfort. All 3M™ SecureFit™ safety glasses use patented SecureFit™ Pressure Diffusion Temple (PDT) technology, which adjusts the amount of force exerted on different head sizes to provide optimum pressure for safety and comfort. The goggles are distinguished by their lightness (weight approx. 19g), so they do not bother the wearer, even during the whole working day. They protect against mechanical impact and the polycarbonate lenses block 99.9% of UV rays (compliant with ANSI Z87.1-2010 standard). The lens coating is non-scratch and non-rusting. The shatter-resistant nature of the lenses makes them extremely durable.