Precise helmet-to-goggle fit with our widest field of vision, highest contrast lenses, and the unprecedented versatility to easily switch between toric and cylindrical lenses. The Anon M4 Cylindrical Goggles offer a precise helmet-to-goggle fit with the wide field of view and low-profile design of a cylindrical lens. Our innovative Magna-Tech quick lens-change technology uses powerful magnets to make lens changes easier than ever. The M4 offers the unprecedented versatility to switch between toric and cylindrical style lenses. This edition of the M4 includes two cylindrical lenses featuring Perceive optics for high-contrast, terrain-defining clarity and our best anti-fog treatment for crystal clear vision through a wide range of conditions. Magnetic Face Mask Integration (MFI ) provides seamless face mask attachment, and full-perimeter vents maintain consistent airflow for fog-free clarity. An MFI face mask, microfiber goggle bag, and lens compression case are included.