The Smith I/O Mag is a fan favourite in the range, featuring a medium fit with all of the I/O tech that has developed over its fabled history. Featuring a sleek silhouette, a large field of vision and sharpest optics to give you the best possible read on the terrain. The MAG tech allows you to interchange the two included Chromapop lenses in a jiffy.  The I/O Mag is a medium fit goggle, suitable for all face shapes, and has some of the best helmet compatibility of all goggles. If you are looking for something larger, the I/O Mag XL has all the same features in a larger package. Also included is a Gogglesoc lens protector, and microfiber bag for cleaning and storage. Features Spherical Carbonic-x lens for distortion-free optics and impact resistance ChromaPop™ lenses enhance contrast and natural color to make the details pop 5X™ anti-fog inner lens for advanced fog-free performance Smith MAG™ lens change system uses magnets for quick, easy lens changes Fits over the glasses (OTG) and is compatible with our optical docking system (ODS) prescription lens insert Designed for ultimate integration with Smith helmets for maximum comfort, venting and fog-free performance QuickFit strap adjustment system lets you find the right fit fast Ultra-wide, silicone-backed strap stays put Three-layer DriWix face foam wicks moisture for a fog-free fit Responsive Fit™ frame adjusts to your face for a precise, comfortable fit Medium fit Smith I/O Mag Ski Goggles