Even the best style in the world is nothing without comfort, so this pair of sunglasses is designed with custom-engineered spring hinges and added Unobtainium sleeves to the temples. That way, they maintain a secure fit that stays comfortably in place, even when you sweat. The frame makes contact only at the sides of the head and the bridge of the nose, taking full advantage of the Three-Point Fit that holds the lenses in precise optical alignment. The lenses are made of pure Plutonite, a material that filters out 100% of all UVA, UVB, UVC and harmful blue light up to 400nm. Ultraviolet light can sneak around the sides of any sunglass lens, so they are designed with 8.75-base lens curvature to maximize protection. Doing that was no simple task because extreme lens contours can affect vision. Thats why Oakley invented XYZ Optics, a patented technology that maintains visual clarity along the entire lens contour, even in the periphery. Put it all together and you have sunglasses with a level of clarity and impact protection that meets all ANSI Z80.3 standards.