Oakley Men's MPH Half Jacket Sunglasses composite frame composite lens polarized Lens width: 60mm O Matter frame and components maintain low weight while holding the sunglasses in place even when you sweat Three-Point Fit holds lenses in specific optical alignment for optimal clarity and coverage Interchangeable High Definition Optics lenses maintain sharpness and focus all the way out to your peripheral edge Plutonite lens materials filter out harmful UV rays, while Iridium lens coating further reduces glare when you're looking over water or snow in broad daylight Semi-rimless design allows for an open downward view that won't restrict your vision