The men’s Anon M2 goggle features Magna-Tech® Quick Lens Change Technology, using 16 powerful neodymium magnets to make lens changes easier than ever. (MFI®) seals the Anon MFI to the goggle in a snap. Spherical Lens Technology mimics the curvature of the human eye for superior optics, while SONAR lens technology by ZEISS enhances contrast for the best possible definition and terrain recognition. Full perimeter channel venting ensures maximum airflow for clear, fog-free vision in all conditions. Includes, spare lens for cloudy conditions, and microfiber goggle bag for storage and cleaning the lenses.