Crews Klondike Safety Glasses With Lightweight Polycarbonate Lens - Black Frame And Clear Lens - KD110 Crews KD110 Klondike Safety Glasses, Matte Black Frame, Clear Lens Attractive, modern design gives you a stylish, light-weight option that you'll want to wear all day long. Strong polycarbonate lenses provide excellent protection from flying debris. Adjustable temples and gel nose piece enhance wearing comfort. DuramassR coating delivers superior scratch resistance. Blue block filters out 99% of harmful U.V. radiation.