Anon offers an extensive selection of goggle lens options in various tints for adapting the Anon M4S goggles to any weather condition. The M4S is unique in that it is compatible with cylindrical and toric lenses. These Anon M4S cylindrical Perceive lenses feature high-contrast, terrain-defining optics with a coating that resists scratches, smudges, and water to give you unmatched clarity, plus an anti-fog treatment for crystal clear vision through a wide range of conditions