Features of the Smith Headliner Polarized Sunglasses ChromaPop? polarized lenses cut glAre and enhance color and contrast Carbonic polarized lenses cut glAre and Are impact-resistant Carbonic lenses offer impact resistance and clear optics Smudge and moisture resistant coating for easy cleaning and clear optics (ChromaPop? option only) Anti-reflective coating improves clarity and reduces eye strain (ChromaPop? option only) Medium Fit, medium coverage 4-base lens curvature is just right for everyday wear Megol nose pads provide non-slip grip so glasses stay put Evolve? bio-based frame material is lightweight and durable