Description of Oakley Monster Dog Sunglasses - Crystal Black / Black Iridium HIGH DEFINITION OPTICS® (HDO®) combines patented optics and PLUTONITE® lens material that provides 100% UV filtering and unsurpassed impact protection. Durable O MATTER® frame material forms massive fangs around the skull, combining with pure PLUTONITE® lenses to beat ANSI Industrial Standards for impact protection. Patented XYZ OPTICS® maximizes peripheral vision while retaining critical clarity at all angles of view. These sunglasses are tagged with true metal icons. This bulldog of art and technology can be augmented with polarized lenses or IRIDIUM® lens coating for precisely tuned transmission. Features: Black Iridium Lens: Extremely bright light Excellent all-purpose lens for sunny conditions Offers truer color perception Features an Iridium® coating to reduce glare. Light Transmission: 10% Protection Index: 3 Conditions: extremely bright light Neutral / Contrast: Neutral