Description of Oakley Stockholm Snow Accessory Lens - Blue Iridium HIGH DEFINITION OPTICS® (HDO®) combines patented optics and PLUTONITE® lens material that provides 100% UV filtering and unsurpassed impact protection. Change your look instantly and get the best possible performance by matching your optics to your environment. Oakley's pure PLUTONITE® lens material stops 100% of all UV, even those nasty rays that are linked to premature wrinkles around the eyes. Impact resistance meets all Z87.1 standards of the American National Standards Institute. The dual vented design is matched with F3 anti-fog technology to make fog somebody else’s problem. With so much technology and so many colors, our accessory lenses turn the art of fashion into a science. Features: Blue Iridium Lens: Medium to bright light. Utilizes a contrast-enhancing VR28® lens tint with an Iridium® coating to further tune contrast and reduce glare. Light Transmission: 30 Protection Index: 2 Conditions: medium to bright light Neutral / Contrast: Contrast