The Anon Sync Goggles offer the terrain-defining clarity of Perceive optics and the convenience of our M-Fusion magnetic latch system to secure and guide lenses into place. Full-perimeter venting ensures maximum airflow for a clear, fog-free view in all conditions. They are over the glass compatible for wearing with eyeglasses and include a bonus lens for cloudy conditions plus a microfiber bag for storage and lens cleaning.Anon Sync Goggles + Bonus Lens + MFI Face Mask Features: Unisex frame design; Fits medium and large faces; Helmet compatible; Bonus lens, MFI® face mask, and microfiber goggle bag included 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 M-Fusion combines the simplicity of magnetic lens alignment with a magnetic latch system that makes lens changes a snap 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 Over-the-glasses compatible frame designed to accommodate prescription eyewear underneath the goggles.