This sleek Hingeless Frame System™ protects against major impact and it’s dynamic shape fits around the neck, on top of the head or over a hard hat. No metal parts make Tremor® ideal for electrical work. Strong, lightweight, polycarbonate lenses feature the exclusive Duramass® scratch-resistant hard coating. Proprietary gel temple sleeves provide grip and comfort. A clip-on, breakaway cord is FREE with each pair. Complies with ANSI Z87.1-1989 Standards. Sold by the pair.