Combining easy-going wearability with superior polarized performance, the Smith Proof is designed to be worn every day, all day long. The Smith Proof Sunglasses are designed with a Grilamid TR90 frame providing the gold standard platform for active sunglasses, while hydrophilic Megol on the nose and temple pads ensure a comfortable non-slip fit. When you curve a lens it can bend the light passing through it and distort what you see. Smith Tapered Lens Technology contours the thickness of the lens so that light travels through without disortion. What you see is what you get. This Proof model comes with polarized gray lens that blocks 99.9% of reflected glare while preserving natural colors in order to provide true color definition. Linked to eye diseases, cataracts, and temporary conditions such as "snowblindness," Ultraviolet Radiation (UVA/B/C) is magnified by snow-covered surfaces. All Smith lens tints protect your eyes from 100% of these harmful forms of solar radiation. Proof that Smith designs sunglasses that far exceed our expectations.