High Definition Optics (HDO) combines patented optics and Plutonite lens material that provides 100% UV filtering and unsurpassed impact protection. An open-edge design of lightweight O Matter frame material, the Bottle Cap offers an unobstructed field of downward view. Patented XYZ Optics maintains razor sharp clarity, even with lens curvature that opens peripheral vision. Offering a comfortable fit on all facial sizes, this pair of sunglasses is especially well suited for small to medium-size faces, due to contouring that eliminates the wide corners of conventional frames. This durable optical instrument also provides 100% UV filtering and impact protection that meets all ANSI Z87.1 standards. Its sculpturally integrated hinges are engineered with dual cam action and finished with true metal icons. Oakley's polarized lenses are specially engineered to block the blinding rays of glare that are magnified by flat surfaces such as snow, water and pavement. This technology utilizes a liquid infusion process to bond the polarizing filter at the molecular level. Thats how they eliminate the haze and distortion found in conventional technologies and achieve the best polarized sunglasses on the planet.