NFX MAG OTG snow goggle- Built with a foundation of premium functionality, the NFX Mag utilizes the ultra-fast and super-secure Swiftlock Magnetics lens changing system and proprietary Lumalens color optimized lenses. Tested and endorsed by Dragon&';s world class roster of athletes-including snowboarder Danny Davis who has a Signature model-the NFX MAG OTG sets the bar high with additional features like Dragon&';s patented frameless design, armored venting, helmet compatibility, and OTG-compatibility. Medium fit Swiftlock Magnetics Lens Changing System Patented Frameless Technology Lumalens color optimized technology Premium Injection Molded Cylindrical Lens Armored Venting Super Anti Fog coating Triple Layer Face Foam with Hypoallergenic Micro Fleece Lining Silicone Strap Backing Helmet Compatible Includes bonus lens