Accented with true metal icons, this lightweight pair of sunglasses is made of stress-resistant O Matter with Unobtainium stem sleeves and nose pads that actually increase grip when you sweat. The Three-Point Fit optimizes comfort while keeping the lenses in precise optical alignment. Take a close look at how the lenses contour at the sides, maximizing protection against sun, wind and side impact. Its a full 8.75 base lens curvature that utilizes patented XYZ Optics to offer razor sharp clarity at every angle of view. Youll have extended peripheral vision and performance that meets all ANSI Z87.1 standards, thanks to High Definition Optics (HDO). Oakley HDO also means protection, so it meets all ANSI Z87.1 standards for high velocity and high mass impact resistance. It has interchangeable lenses with Switchlock technology that makes lens changing easy and fast. All lenses are optimized with Hydrophobic/Oleophobic technology that repels dust and helps maintain a smudge resistant barrier against skin oils, lotions and fingerprints while preventing water from leaving streaks and sheens. Plutonite lens material filters out every eye-baking ray of UV, not just UVA and UVB, and youll have a wide array of lens options to adapt to any environment.