The Anon M4 Cylindrical Goggles offer a precise helmet-to-goggle fit with the wide field of view and low-profile design of a cylindrical lens. Anons innovative MAGNA-TECH quick lens-change technology uses powerful magnets to make lens changes easier than ever. The M4 offers the unprecedented versatility to switch between toric and cylindrical style lenses. This edition of the M4 includes two cylindrical lenses featuring PERCEIVE optics for high-contrast, terrain-defining clarity and Anons best anti-fog treatment for crystal clear vision through a wide range of conditions. Magnetic Face Mask Integration (MFI) provides seamless face mask attachment, and full-perimeter vents maintain consistent airflow for fog-free clarity. An MFI face mask, microfiber goggle bag, and lens compression case are included.   FEATURES: Unisex frame design; Fits medium and large faces; Helmet compatible; MFI face mask, bonus lens, microfiber goggle bag, and lens compression case included. MAGNA-TECH quick lens-change technology uses magnets for a seamless and secure lens-to-frame seal that makes for easy lens changes and unsurpassed lens retention. PERCEIVE lens provides high-contrast vision and terrain-defining clarity in just about any light condition; A hydrophobic and oleophobic coating provides unmatched smudge, scratch, and moisture resistance on the outer lens surface for clear optics and easy cleaning. Cylindrical injected lens design reduces peripheral distortion; Integral Clarity Technology anti-fog exceeds basic anti-fog treatment standards, delivering crystal clear vision that lasts for an extended period of time; Wall-to-wall vision incorporates optimal optics in a low-profile frame that utilizes 40% thinner face foam for an ultra-close fit.