The new K3 Shimanami Kaido model guarantees maximum protection even in the most extreme climatic conditions. They incorporate a Special TAC 1.2 mm photochromic polarized interchangeable panoramic lens with anti-fog layer and REVO cover. DrySky anti-fog system. Extremely flexible and resistant PC frame. Maximum lightness: they weigh only 27g! Includes polyurethane case, microfiber bag and spare bands. Our photochromic lens is especially sensitive to different light changes, adapting to the luminary conditions of each moment in an extremely efficient way. Ideal for cloudy and clear days and also for environments and terrains in which sunny and shadowy zones alternate. The K3 PhotoChromic lens controls the transmission of light autonomously, going from Category 2 (42% light transmission) to Category 3 (11% light transmission) in less than sixty seconds, optimizing contrast and favoring visibility.