The Anon M4S Cylindrical Goggles feature the same high-end performance as the M4 Goggles, scaled perfectly for medium-sized faces. These goggles offer a precise helmet-to-goggle fit with the wide field of view and low-profile cylindrical lens design. Anon&';s innovative Magna-Tech quick lens-change technology uses powerful rare earth N52 magnets for effortless lens swaps. The M4S provides the unprecedented versatility to switch between cylindrical and toric lenses. This edition includes two cylindrical lenses featuring Perceive optics for high-contrast clarity and Anon&';s best anti-fog treatment. Magnetic Face Mask Integration (MFI) and full-perimeter vents ensure seamless, fog-free clarity. Fit/Sizing: Unisex frame design, fits medium faces, helmet compatible. Lens Technology: Perceive high-contrast vision and terrain-defining clarity; Hydrophobic and oleophobic coatings resist smudges, scratches, and moisture. Lens Change System: Magna-Tech quick lens-change technology uses N52 rare earth magnets. Lens Style: Cylindrical injected lens design reduces peripheral distortion; Versatility to switch to toric lenses (sold separately). Anti-Fog: Integral Clarity Technology (ICT) exceeds anti-fog certification standards, delivering crystal clear vision that lasts. MFI Compatibility: Magnetic Face Mask Integration for a seamless, gapless seal. Ventilation: Full-perimeter vents maintain consistent airflow. Included: Bonus lens, MFI face mask, Magna-Tech goggles storage case, and goggle sock protector.