One of the most legendary mountain passes in the world inspires the revolution in sports optics that Siroko has initiated. The K3 Mortirolo are purely cutting-edge. Special TAC 1.2 interchangeable panoramic lens, polarized with anti-fog layer and REVO cover. Extremely light latest generation PC frame. DrySky anti-fog system. Includes polyester bag, polyurethane case and spare bands for nose piece and arms. Accessories: photochromic lens, TR90 optical clip, anti-fog lens and clear lens (sold separately).