Plain, simple, and badass, the Dirk looks so tough it broke the mold. Available in polarized and ANSI styles, it features SPY's detail- and mood-boosting Happy Lens(TM) and Trident(TM) polarization. The Dirk is built from virtually indestructible Grilamid(R) and features snap pin hinges, 8-base polycarbonate ARC(R) lenses and 100% UV protection. Available with the color and contrast enhancing Happy Lens(TM) and Trident(TM) polarization Constructed from Grilamid(R), a lightweight frame material ideal for everyday wear due to its strength and flexibility 8-base polycarbonate ARC(R) lenses for increased optical performance High-quality, long-lasting snap pin hinges 100% UV protection reduces eye fatigue and long-term sun damage Frame measures 64-16-125