Smith Optics XC Sunglasses 71673680249 Whatever you're up to, the XC injects it with retro 80s mountain style. They were originally launched in 1984 for Nordic skiers, with a shield shape to block out wind and snow, plus flip-up lenses to let the air in. Today, the heritage look stands out anywhere. Features Frame Smudge and moisture-resistant coatings for easy cleaning and clear optics Evolve™ bio-based frame material is lightweight and durable Fit / Integration AutoLock hinges hold frames open for easy one-hand on and off Medium to large fit, large coverage Goggle inspired strap compatible temple tips 4-base spherical shield lens curvature Vision Modest wraparound fit ChromaPop™ lenses enhance contrast and natural color to make the details pop Megol nose pads provide non-slip grip so glasses stay put Flip-up lens feature Smith Optics XC Sunglasses