The Oakley Turbine Sunglasses crank up the active look with interchangeable icons plus inset zones of sure-grip Unobtainium. Comfortably lightweight O Matter frame. Polaric Ellipsoid geometry maintains precise visual clarity along curves that open up peripheral vision. Three-Point Fit ditches the uneven pressure points of conventional frames. High Definition Optics meet or exceed the testing standards of the American National Standards Institute for optical clarity, visual fidelity, and impact resistance. Unobtainium is a soft hydrophilic synthetic which increases adhesion when wet to grip better when you perspire. A hassle-free nose pad is an adjustable design that won't snag or pull your hair. One size fits most.