Inspired by the iconic western mountain range, the Rocky takes high performance in a solid, aggressive frame to places others just can't reach. With the detail- and mood-boosting Happy Lens(TM), the Rocky features a virtually indestructible GrilamidA(R) construction, 100% UV protection, and small temple openings for a leash. Features Happy Lens(TM) enhances color and contrast, increases clarity, and improves mood and alertness Constructed from virtually indestructible GrilamidA(R) 8x4-base polycarbonate toric lenses for optical superiority 100% UV protection reduces eye fatigue and long-term sun damage Small openings on each temple for easy leash attachment High-quality pin hinges Frame measures 64-15-130