These snow goggles offer ventilating and antifog technology, crystal-clear vision and light-to-dark swap lenses with Smith's easiest lens-change system. 170mm lens width 100% UV protection Designed for ultimate integration with Smith helmets (sold separately) for maximum comfort, venting and fog-free performance QuickFit strap adjustment system lets you find the right fit fast Cylindrical Carbonic-x lens for clarity and impact resistance with built-in Airflow technology for active ventilation 5X™ anti-fog inner lens for advanced fog-free performance ChromaPop lenses enhance contrast and natural color to make the details pop MAG lens change system uses magnets for quick, easy lens changes Ultrawide, 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 Polycarbonate outer lens; cellulose acetate or cellulose propionate inner lens Made in the USA