The Smith Trackstand Sunglasses. A throwback to the ultimate in classic retro and possible the coolest era of cycling sunglasses history. Including 2 interchangeable ChromaPop™ lenses for varying light conditions and a vented brow construction to increase airflow as the temperatures fluctuate, the Trackstand also has two-position adjustable nose pads and megol temple hits to keep the stylish look locked onto your face.Key FeaturesHydroleophobic lens coatingHydrophilic megol nose pads for a secure fitMedium fit / medium coverageTwo-position adjustable nose padsAuto-lock hinges7x4 toric lens curvatureTR90 frame material