This Chaneleon of eyewear was Oakley's first dual lens eyewear with interchangeable lenses. The open-edge design extends your vertical field of vision, and each set of optional lenses retains the peripheral clarity of XYZ OPTICS®. The lightweight O MATTER® frame includes UNOBTAINIUM® earsocks and grip anchors. That is just some of the patented innovations that give HIGH DEFINITION OPTICS® (HDO®) its unbeatable performance.