As an evolution of the legendary O Frame® goggle, the O Frame® 2.0 PRO family has Oakley DNA pumping through every vein. The O Frame® 2.0 PRO MTB extends the O Frame® 2.0 PRO style and performance to a mid-sized fit, but there is nothing medium about it. The large lens with streamlined frame geometry expands peripheral view in every direction.High Definition Optics®Oakley’s patented High Definition Optics® (HDO®) eliminates distortion to give you clearer, sharper, and more accurate vision.