The whoosh of your buddy passing you through the rock garden is basically just an invitation to chase. You'll be happy to oblige in these Smith Attack MTB sunglasses. The maximum-coverage lenses use ChromaPop™ technology to provide amplified detail and enhanced color, so you can stay focused on the trail ahead. The no-slip temples and two-position nose pad keep them in place over every baby head and wet root. When you finally catch up and cruise back to the shuttle, quickly swap between the included bright-light and low-light lenses using Smith's MAG™ lens interchange system. FEATURES : ChromaPop™ lenses enhance contrast and natural color to make the details pop Smudge and moisture resistant coating for easy cleaning and clear optics Larger, maximum-coverage lens features ventilation channel for fog-free vision 100% UV protection Medium fit, large coverage 7x4 toric lens curvature Two-position adjustable nose pads Lightweight, flexible and durable TR90 frame Smith MAG™ lets you change lenses quickly AutoLock hinges hold frames open for easy one-hand on and off