The anon. M3 goggle features Magna-Tech™ Quick Lens Change Technology, using 18 rare earth magnets to make lens changes easier than ever. Cylindrical Lens Technology provides maximum field of vision without distortion, while Outlast® Fog Management Face Fleece eliminates moisture before it clouds up the lens. Magnetic Facemask Integration (MFI) seals your anon. MFI facemask to the goggle in a snap. The goggle is Over the Glasses (OTG) compatible for wear with eyeglasses. Includes MFI Facemask, spare Graybird lens, compression-molded storage case, and microfiber goggle bag for storage and cleaning the lens.