Lens Specification: Lens inclination adjustment with snap-lock ratchet mechanism Single wraparound 180 degree lens 2mm polycarbonate material tested at velocity to shield from impact Crystal clear optical class 1 lens recommended for continuous wear Fog prevention coating Hard coated both sides for resistance to scratching Frame Chassis Protective brow guard injected in buff polished nylon Multi-length temple adjustment with 4 locking positions High comfort PVC tip composite PVC nose fit moulded for comfort Weight - 26g / 0.917oz