Combining a bold front with sleek temples in a mid-sized frame, the Montana brings big performance to the biggest skies. Features include the detail- and HD+ lens, a virtually indestructible Grilamid® construction, high-quality pin hinges, and 6-base polycarbonate ARC® lenses providing 100% UV protection. HD+: Combines the superior clarity of our digitally mastered High Definition lenses with the therapeutic and visual performance benefits of our patented Happy Lens™ . Enhanced color and contrast, improved mood and alertness, and impact resistant distortion free optics in one kick-ass package that SPY loyalists have come to know and love. It’s probably the best lens ever. 673407973864