Oakley Switchlock Interchangeable Lens Technology Removable Retaining Strap Durability and all-day Comfort of Lightweight, Stress-Resistant O Matter Frame Material Unobtainium Components that Increase Grip When you Sweat Comfort and Performance of Three-Point Fit that Holds the Lenses in Precise Optical Alignment Interchangeable Metal Icons High Definition Optics for Clarity Meets all ANSI Z87.1 Standards XYZ Optics to extend Clarity to the Edge of a Wide Peripheral View 8.75 Base Lens Curvature that Improves Side Protection Against Sun, Wind and Impact UV protection of Plutonite® Lens Material that filters out 100% of UVA / UVB / UVC & Harmful Blue Light up to 400nm Polarized Options–Minimized glare via technology that produces the best polarized lenses on the planet Transitions® SOLFX® photochromic lenses options: Darkens and lightens the lens in response to the environment Iridium Coated Lenses that Reduce Glare and Balance Light Transmission Oakley Authentic Prescription Lenses