unobstructed view with the flight deck snow goggles. inspired by the helmet visors of jet pilots, the oakley flight deck has an unrivalled field of view with a wide range of helmet compatibility. stealth looks, crisp vision - you're set to fly fo' sho'!prizm black iridiumprizmâ„¢ lenses have been engineered to reduce the need switching lenses as lighting conditions change. prizmâ„¢ lenses provide unprecedented control of light transmission resulting in colours precisely tuned to maximize contrast and enhance visibility. the premium iridium lens coating is made with superheated metal oxides, also designed to balance light transmission and reduce glare.dark sienna brown based lens tint with a black mirrored finish. cuts glare and reduces eye fatigue in bright, sunny conditions on mountains and glaciers.filter category: 4transmittance of visible light: 5 %