The Anon M4 MFI guarantees a precise helmet-to-goggle fit with our widest field of vision, highest contrast lenses, and the unprecedented versatility to switch between toric and cylindrical lenses. 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 MFI technology (Magnetic Face Mask Integration) uses magnetic connection to quickly seal your face mask to your goggles without obstructing ventilation for a gapless setup that seals out the elements No-slip silicone strap keeps the goggles in place so riders can focus on the terrain; Over the Glass compatible frame designed to accommodate prescription eyewear underneath the goggles 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 Triple-layer face foam features two layers of foam, including a slightly denser layer closest to the face, and a layer of moisture-wicking fleece for a snug seal and comfortable fit; Lightweight, dual-molded PC-ABS/TPU frame combines a rigid outer frame that improves lens interface performance and rigidity with a soft and flexible inner frame that maintains a comfortable fit on the face Full perimeter vent channel maximizes airflow to bring fresh air in and move hot air and moisture out for clear vision