The oakley m2 xl sunglasses have fluid contours and sleek lines that add velocity to the look of this sport performance sunglass the latest evolution of the renowned m frame and its interchangeable lens design the oakley m2 frame steps up styling with new earstem sculpturing and wrap around unobtainium earsocks and nosebombs made of the sure grip material durable comfortable and ready for competition the patented high definition optics hdo on these cycling sunglasses provides super