Monster Dog Sunglass 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 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