Smith took the Smith MAG interchangeable system and integrated it with a more expansive window to the mountains. The I/O MAG XL&';s extra-large spherical ChromaPop lens enhances clarity and amplifies your experience. With OTG compatibility in mind, the I/O MAG XL design integrates seamlessly into helmets to provide the ultimate fit and function as a fog-free system. Smith MAG interchangeable system Includes bright light and low light ChromaPop performance lenses Spherical carbonic-x lens Anti-fog inner lens TLT lens technology for crystal clear vision OTG Compatible Large fit Responsive Fit frame design QuickFit strap adjustment system with clip buckle 3-layer DriWix face foam Available in Low Bridge Fit Helmet compatible Ultra-wide, silicone backed strap ODS3 compatible Includes two lenses: Bright light and low light ChromaPop performance tints and microfiber goggle bag with replacement lens sleeve