Oakley GP-75 Radarlock Sunglasses follow in the styling traditon of the original Oakley Blades. That is to say, styling based purely on high-performance function. Oakley performance features have come a long way since the Blade, though. From Switchlock Lens Technology to High Definition Optics, the Radarlock is packing some of the most innovative technology for until-now-unheard-of optical performance. On top of that, Oakley added GP-75 Limited Edition styling for a truly exclusive look.Switchlock Technology lets you change lenses quickly and easily without stressing or smudging them Two sets of lenses (one for bright light and one for low light) included O-Matter frame is stress-resistant and ultra-lightweight XYZ Optics ensure distortion-free vision for the entire width of the lens Plutonite lens exceeds ANSI 787.1 for impact-resistance and blocks 100% of UVA, UVB, and UVC light Interchangeable icons so you can change the look with your mood Unobtainium hydrophilic nose and temple pads eliminate slipping Multiple Unobtainium nose pad options for a customizable fit Patented three-point fit maintains optical alignment Included retaining strap for when the ride or run gets intense Product FeaturesFrame: O Matter (polycarbonate)Hinge: Lens: HDO (High Definition Optics)Interchangeable Lens: yesLenses Included: Polarized: Photochromic: Base Curve: Face Size: medium to largeFrame Measurements: Case Type: Nose Pads: yesTemple Pads: Recommended Use: athletic activitiesManufacturer Warranty: 1 year