The ultimate sport performance product, The RadarLock Path sunglasses let athletes take full advantage of Oakley's wide array of performance lenses, thanks to an ingenious invention called Switchlock Technology that makes lens changing fast and hassle-free. 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 RadarLock or wishing you were.HDO sets the standard for optical clarity, visual fidelity, and impact resistance, and RadarLock is racked and 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 and enhanced side protection against sun, wind and impact. You'll have optical performance rated at ANSI Z87.1, and that same uncompromising level of standards applies to protection against high velocity and high mass impact. For even more protection, the Plutonite lens material filters out every eye-searing ray of UV.