Spy Montana Sunglasses Experience the road like never before with Spy Montana Sunglasses. Crafted with durable Grilamid frames and pin hinges, these shades offer superior protection against breakage. Enjoy full UV protection through polycarbonate ARC lenses while benefiting from Happy Lens technology for enhanced color and contrast. Elevate your outdoor adventure with the Montana Sunglasses. Features: Features the Happy Lens Virtually indestructible Grilamid frame Pin hinges 6-base polycarbonate ARC lenses 100 UV protection Happy Boost Lens Technology maximizes color contrast up to 30 for superior clarity (select models) Bridge width: 16mm Temple length: 140mm Lens width: 54mm