The anon Tempest Mask is a perfect storm of style and performance enhanced by ZEISS SONAR lens technology for maximum contrast and clarity. Elegant and stylish, the Anon Tempest women's mask features a women's specific design for the best fit and comfort. Magnetic Facemask Integration (MFI®) seals Anon's MFI facepiece accessories (sold separately) to the mask in a quick snap. ZEISS SONAR lens technology enhances contrast for the best possible definition and terrain recognition. Spherical lens technology mimics the curvature of the human eye for superior optics, and the swing arm for snap-fit mounting provides the best possible protection for helmet alignment. Full venting of the perimeter channel ensures maximum airflow for a clear and fog-free view in all conditions. Includes a microfiber eyeglass case for storing and cleaning the lenses.