The 16001 is a plastic wrap around frame made out of TR-90 Nylon with incorporated side face protection. The unique shape of the lenses and the comfortable adjustable nose pads, offer a sleek and lightweight feel to these stylish Black/Blue safety frames.This product offers our standard high quality, distortion-free SF-6 Schott glass, radiation-reducing lenses with .75mm lead equivalency. Model 16001 fits best for Large style heads.