The Anon M4S Cylindrical Goggles feature the same high-end performance of the M4 Goggles in a frame scaled for medium-sized faces. They 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 a powerful magnetic interface that allows you to swap lenses with ease. The M4S offers the unprecedented versatility to switch between toric and cylindrical style lenses. This edition of the M4S 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. Includes an MFI face mask, microfiber goggle bag, and bonus lens.