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 Toric 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. FEATURES: Designed to fit Anon M4 Goggles Coated for unmatched smudge, scratch, and moisture resistance; Integral Clarity Anti-Fog Technology delivers crystal-clear vision Cylindrical Injected Lens enhances clarity and peripheral vision while maximizing vent volume Lens compression case included All Anon lenses offer 100% UV protection and exceed ANSI Z87.1 impact test standards Integral Clarity Technology Anti-Fog exceeds basic anti-fog treatment standards, delivering crystal clear vision that lasts for an extended period of time.