Oakley lens tints are engineered to offer the best combination of light filtering, color balance and visual contrast. Visibility on the mountain can vary wildly, from socked-in blizzards to blindingly bright sunlight, and everything in between. Oakley offers a comprehensive array of performance lenses that match specially engineered base tints with unique IRIDIUM® coatings, designed to precisely tune, contrast and balance light transmission.Specifications:prizm Snow Black Iridium:- Light Transmission: 5.5%- Light Conditions: Bright Sun- Contrast: Increasedtechnology:- Prizm™ Snow Lenses: Oakley's Exclusive Lens Technology Designed To Enhance Color And Contrast So You Can See More Detail.