The new K3 Aspen were born from months of technological investigation and their design is truly against the grain. Special TAC 1.2 interchangeable panoramic lens, polarized with anti-fog layer and REVO cover. DrySky anti-fog system. Extremely flexible and resistant PC frame. Maximum lightness: they weigh only 27 grams! 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).