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- PERCEIVE lens provides high-contrast vision and terrain defining clarity in just about any light condition- Toric Injected Lens combines the best lens design characteristics for enhanced clarity and peripheral vision while maximizing the goggles vent volume- A hydrophobic and oleophobic coating provides unmatched smudge, scratch, and moisture resistance on the outer lens surface for clear optics and easy cleaning- Integral Clarity Technology Anti-Fog exceeds basic anti-fog treatment standards, delivering crystal clear vision that lasts for an extended period of time- Lens compression case included- Anon Warranty All Anon products are backed by a 1-year warranty from date of purchase. Anon helmets are also backed by a 2-year crash replacement policy.