Oakley Radarlock XL, Polarised, Vented Sunglasses Three decades of Oakley innovation have changed sunglasses from a generic accessory to vital equipment, & all that evolution has led to a single inevitable outcome: the best performance eyewear on earth. This is it, & you can thank the world's greatest athletes & their relentless pursuit of perfection because that's what drove us to defy the limits of what is possible. Whether you're competing for Gold or just squeezing every ounce of possibility out of those prized moments of athletic escape, you're either wearing Radar Lock or wishing you were. Engineered to extend your angle of view in sport applications when your head is tilted downward, the XL rendition of Oakley's ultimate athletic design has the added benefit of optional straight stem geometry that optimizes the fit for helmet use. Radar Lock XL offers a full 19mm height at the nose bridge so your head can stay tucked in activities like cycling, & it comes with all the premium features including Switchlock Technology that lets you adapt your vision quickly & easily by taking advantage of our wide array of interchangeable lenses. You'll also have unbeatable comfort, along with the unrivaled clarity & protection of High Definition Optics (HDO) for taking performance beyond the limits of reason. If you haven't heard about Oakley Switchlock Technology, you're wasting too much time fumbling with the outdated designs of ordinary interchangeable lens systems. Our simple switch mechanism makes the process quick & easy, & the lens is held securely in place without uneven pressures that can bend it & distort your vision. Somebody finally got it right, & did so with a vengeance against conventional technology.HDO sets the standard for optical clarity, visual fidelity & impact resistance, & Radar Lock XL is racked & revved with all those benefits including Polaric Ellipsoid geometry to extend clarity across the entire lens. The sweeping contour gives you a wide-open view with maximized peripheral vision & enhanced side protection against sun, wind & impact. You'll have optical performance rated at ANSI Z87.1, & that same uncompromising level of standards applies to protection against high velocity & high mass impact. For even more protection, our Plutonite lens material filters out every eye-searing ray of UV. The lightweight yet insanely durable frame is made from O Matter & shaped with surge ports to maintain a cooling flow of air. Interchangeable nose pads let you achieve a comfortable, customizable fit, & the earsocks are made from the same sport-optimized Unobtainium to increase grip when you sweat. You won't feel any uneven pressure points with this frame because its Three-Point Fit holds the frame comfortably in place while keeping the lens in precise optical alignment. Choose Oakley HDPolarized technology & enjoy the glare-killing clarity of the best polarized lenses on the planet. Balance light transmission & tune your vision with Iridium lens coatings, & take advantage of Oakley Photochromic technology for optics that darken automatically in response to sunlight. Oakley authentic Prescription Lens Inserts are available for Radar Lock XL, & you can select whatever lens options you want.