With the Oakley SI Straight Jacket Sunglasses, you get the unbeatable clarity of High Definition Optics (HDO) including patented technologies like XYZ OPTICS for crystal clear vision along the entire lens contour. The optics of this Sunglass from Oakley SI are so sharp, they exceed all ANSI Z87.1 standards. The O-Matter Frame Material on the Oakley SI Straight Jacket Sunglasses utilizes soft Unobtanium components to increase grip with perspiration. For a great looking way to keep your eyes safe, choose the Oakley Standard Issue Straight Jacket Tactical Sunglasses. + BUNDLE with Designer iWear Complimentary Eyewear Care Kit