The 2.0 version of the Oakley Half Jacket Sunglasses is all about performance, protection, and comfort. They are sculpted into a new dimension of style with an interchangeable lens design that keeps you a step ahead of changing light conditions. The latest evolution of the popular Half Jacket wraps your vision in razor-sharp clarity with High Definition Optics® (HDO). HDO keeps your vision clear and helps to differentiate between colors. These sunglasses also contain XYZ Optics® to keep vision sharp and accurate all the way to the peripheral edge. The lenses are made of pure Plutonite® to filter out all UV rays, while meeting ANSI Z87.1 standards for optical clarity and impact resistance. Lens curvature is designed to protect from sun, wind, and impact along the sides too. The frame of the Half Jacket 2.0 is the same lightweight O Matter® material you depend on, with UNOBTAINIUM® components to keep it comfortably in place, increasing the grip as you sweat. O Matter is designed for all-day comfort within a light, stress-resistant frame. The Three-Point Fit won’t hook your ears like ordinary frames, but it keeps the lenses in precise alignment through the action. Metal icon accents with a semi-rimless design for an open downward view. Options for the Half Jacket 2.0 include Iridium® lens coatings to balance light transmission and reduce glare. For the ultimate in glare-cutting performance, use HD Polarized lenses. Transitions® SOLFX® photochromic technology can automatically darken the lenses in response to sunlight.