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 mood-boosting Happy Lens(TM), a virtually indestructible Grilamid(R) construction, high-quality pin hinges, and 6-base polycarbonate ARC(R) lenses providing 100% UV protection. Happy Lens(TM) enhances color and contrast, increases clarity, and improves mood and alertness Available with Trident(TM) polarization that eliminates reflective light Constructed from Grilamid(R), a lightweight frame material ideal for everyday wear due to its strength and flexibility 6-base polycarbonate ARC(R) lenses High-quality pin hinges 100% UV protection reduces eye fatigue and long-term sun damage Frames measures a medium 54-16-140