Spy Optic Dirk SOSI ANSI Sunglasses 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 and Trident polarization. The Dirk is built from virtually indestructible Grilamid and features snap pin hinges, 8-base polycarbonate ARC lenses and 100% UV protection.