Lowlight Variable Violet Spare Cylindrical Lens Customize your M4S goggles with a terrain-defining, high-contrast Perceive lens. Adapt your Anon M4S goggles to different weather conditions. The M4S is unique in that it's compatible with cylindrical and toric lens shapes. These Anon M4S Perceive Cylindrical Goggle Lenses are available in condition-based tints for cloudy, variable, or sunny conditions. All 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.