Anon Sync MFI Goggles The Anon Sync MFI Goggles combine terrain-defining optics with an easy lens-change system and a low-profile frame built for all-day mountain visibility. PERCEIVE lens technology enhances contrast and terrain definition across changing light, while the cylindrical lens construction helps reduce peripheral distortion. M-Fusion magnetic-assisted lens technology makes swapping lenses quick and intuitive when conditions change, and Integral Clarity anti-fog treatment works with full-perimeter ventilation to help keep your view clear. With an OTG-compatible medium fit, included bonus PERCEIVE lens, and MFIA(R) face mask, the Sync comes ready for everything from bluebird laps to storm days. Summary Fit Medium Lens Shape Cylindrical Lens Technology PERCEIVE Lens Change M-Fusion Magnetic Assisted Bonus Lens PERCEIVE bonus lens included OTG Yes Warranty 1 Year