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.A gray-based lens boosted with ChromaPop color enhancement technology and finished with a deep platinum mirror shine. Great for use in areas of high sun exposure, this lens will enhance color and clarity and let you effortlessly see more detail. Provides 100% protection from harmful UVA/B/C rays. VLT = 15%.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