Shoei Cwr-F2 Photochromatic Face Shield Transitions Photochromic technology allows visors to automatically and seamlessly change from clear to dark in sunlight. The process works when photochromic dyes embedded into the lens or shield react to UV light, changing levels of darkness with the sun. When UV light is removed, a chemical reaction driven by ambient heat reconverts the activated photochromic molecules to their original, clear form and the lens fades. Features: 100 UV protection Fades to 50 transmission in two minutes Anti-reflective coating Fits Shoei Rf-1400 and X15 helmets Note: Due to manufacturer restrictions, Shoei products can only be shipped to addresses within the United States