At the heart of the Z87.1+ rated collection, Flux presents a sleek, confident look with the advantage of an unobstructed vertical viewing plane due to its semi-rimless construction. Made of TR90nzz and tested at over 11 times stronger than hinges made of regular TR90, Gargoyles G-Loc hinges deliver solid performance every time, whether on the field of battle or firing up the backyard barbeque. Gargoyles' signature lens formula means superior optics with pin-point precision. All Gargoyles lenses are ballistic-rated - meeting or exceeding ANSI Z871.1+ impact standards - and offer superior optics along with anti-reflective and oleophobic treatments to repel water, resist smudging, and make cleaning easier. 100% UV protection. TR-90 NZZ frame material.