Smith's ChromaPop lens tech boosts color and contrast, so every wind lip, landing, and tree glade is as sharp as possible. It gets their 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 I/O MAG S is scaled down to fit smaller faces. 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. 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.