Inspired by the crystal-clear water of Lake Tahoe, the Tahoe represents the pinnacle of GUNNAR engineering and the best optical materials on the market. A modern rectangular-shaped acetate frame built around GUNNAR patented technology and mineral glass lens material. The GUNNAR mineral glass lens, the same material used in high-end cameras and telescopes, provide unparalleled scratch and shatter-proof resistance in addition to superior optics. Available in GUNNAR-Focus in both 65 GBLF Amber protection and the new 20 GBLF Clear Pro offering the highest fidelity and color rendition