Mixtapes, music videos, and big hair. Head back to the future with the 80s feel of these Smith XC sunglasses from our 1983/84 Collection. The retro vibe lives on with a flip-up lens and heritage styling dating back to the Smith Cross-Country sunglasses. ChromaPop™ lenses make sure the future is sharp, with contrast and color-boosting optics. Acid-washed jeans and neon jackets, optional. Vision ChromaPop™ lenses enhance contrast and natural color to make the details pop Flip-up lens feature Smudge and moisture-resistant coatings for easy cleaning and clear optics Fit / Integration Medium to large fit, large coverage 4-base spherical shield lens curvature Modest wraparound fit Megol nose pads provide non-slip grip so glasses stay put Frame Evolve™ bio-based frame material is lightweight and durable AutoLock hinges hold frames open for easy one-hand on and off Goggle inspired strap compatible temple tips