Anon M3 Goggles Their Magna-Tech™ Quick Lens Change Technology allows for an easy transition between different lenses so that you can customize how you outfit your eyes. Their compatibility to MFI facemasks allows you to get as snug a fit as possible between your goggles and mask so that icy blasts can't reach you. You and your eyes deserve it, make the Anon M3 Goggle a part of your mountain-going get up! Anon Cylindrical Lens Technology Integral Clarity Technology (ICT) – Anon's ICT anti-fog treatment delivers crystal clear vision, no matter what the elements throw at you. Starting with a porous cellulose inner lens surface for superior water shedding above and beyond standard acetate lenses, Anon applies its chemically etched ICT anti-fog treatment for long-lasting clarity. ICT works in tandem with Full Perimeter Channel Venting to tell moisture to go fog itself. Magna-Tech™ Quick Lens Change Technology – The cat's pajamas of lens change systems, M1 Magna-Tech uses 14 rare-earth magnets at seven magnetic connection points around the perimeter of the frame that when fully bonded with self-aligning engagement, the combined retention can hold 16.5 pounds. Solid. Full Perimeter Channel Venting No-Slip Silicone Strap Specs Frame Size:Medium, OTG (Over The Glasses) Lens Type:Cylindrical Quick Changing Lens System:Yes Helmet Compatible:Yes Comes with sunny lens, and low light lens