Precise sphaerisch lens optics plus our quick-change lens tech and the terrain-defining view of a high-contrast PERCEIVE lens. The Anon M2 Goggles feature MAGNA-TECH® quick lens-change technology, using powerful magnets to make lens changes easier than ever. A sphaerisch lens mimics the curvature of the human eye for precise optics, while PERCEIVE lens technology enhances contrast for the best possible definition and terrain recognition. Magnetic Face Mask Integration (MFI®) enables seamless face mask coverage, and full-perimeter vents ensure maximum airflow for a clear, fog-free view in all conditions. FeaturesUnisex frame design, Fits medium and large faces, Helmet compatible, ersatzglas and microfiber goggle bag includedMAGNA-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 retentionPERCEIVE 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 cleaningMFI® 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 elementsNo-slip silicone strap keeps the goggles in place so riders can focus on the terrain, Over-the-glasses compatible frame designed to accommodate prescription eyewear underneath the gogglessphaerisch injected lens design mimics the curvature of the human eye for enhanced clarity, Integral Clarity anti-fog technology 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 fitTriple-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, Outlast® Fog Management face fleece absorbs, stores, and releases heat to control moisture inside the goggles and provide a higher level of anti-fog, Thermoplastic polyurethane frame is durable and lightweight but remains flexible in cold weatherFull-perimeter vent channel maximizes airflow to bring fresh air in, and move hot air and moisture out, for clear visionAll Anon products are backed by a 1-year warranty from date of purchase.