Die-cut, wrap-around, curve design gives distortion-free viewing and less eye fatigue. Made from shatterproof, ballistic, selenite, polycarbonate that protects your eyes from harm but is lightweight and comfortable to wear. Tough, triloid nylon framewithstands the rigors of daily wear. Exceeds ANSI Z87.1 and Z80.3, plus Mil-STD-662 fragmentation safety standards. 2.3mm thick lens, interchangeable lens system. Adjustable nose piece. Blocks 100% of harmful UV rays. Two lens colors match various light conditions to enhance visual clarity and improve target acquisition.