The Smith Men's I/O Mag XL Snow Goggles uses the MAG™ interchangeable system integrated 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.