You can only scope your line if you can see where you're going. Putting on the Smith I/O MAG goggles is like flipping the switch from regular to widescreen. Our ChromaPop lens tech boosts color and contrast, so every wind lip, landing, and tree glade is as sharp as possible. It gets our highest level of anti-fog treatment and integrates with our helmets for airflow that keeps them fog-free through all weather conditions. Whether the day dawns clear or stormy, lens swaps are a snap thanks to our quick-swap MAG lens system. Because no two faces are the same, the XL model expands on the standard size for those looking for the largest possible lens. FEATURES: Vision Smith MAG lens change system uses magnets for quick, easy lens changes Spherical Carbonic-x lens for distortion-free optics and impact resistance 5X anti-fog inner lens for advanced fog-free performance ChromaPop lenses enhance contrast and natural color to make the details pop Fits over the glasses (OTG ) and is compatible with our optical docking system (ODS) prescription lens insert Fit / Integration 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 Large fit; Low Bridge Fit for faces with a lower nose bridge and/or a wide or high cheekbone shape.