Oakley's A Frame snow goggles feature a triple-defense fog-prevention system to ensure your best performance. Strategic surge ports control airflow, while the F-3 Series anti-fog treatment permanently protects the lens. Top it off with a dual lens design—with an engineered barrier of trapped air—and fog-ups will be a thing of the past. You'll be free to enjoy the clarity of High Definition Optics® and full UV protection that will keep your vision clear and your head comfortable, even in the coldest conditions. The optically pure Plutonite® lens meets ANSI Z87.1 impact-protection standards, while patented Polaric Ellipsoid™ lens geometry aligns to your eyes for a distortion-free view.