The men's Anon M3 Polarized Goggle features Magna-Tech® Quick Lens Change Technology, using 16 powerful neodymium magnets to make lens changes easier than ever. Spherical Lens Technology mimics the curvature of the human eye for superior optics, while the polarized lens increases depth perception and reduces fatigue-causing glare for improved vision. Magnetic Facemask Integration (MFI®) seals Anon's MFI facemask accessories (sold separately) to the goggle in a snap. Full perimeter channel venting ensures maximum airflow for clear, fog-free vision in all conditions. Includes a spare lens for overcast/cloudy conditions and a microfiber goggle bag for storage and cleaning the lens.