Anon offers an extensive selection of goggle lens options in various tints for adapting the Anon M4 goggles to any weather condition. The M4 is unique in that it is compatible with cylindrical and toric lenses. These Anon M4 cylindrical Perceive lenses feature high-contrast, terrain-defining optics with a scratch, smudge and water-resistant coating for unmatched clarity and an anti-fog treatment for crystal clear vision through a wide range of conditions.