Sun, rain, wind, mud… To take on the toughest challenges you must have the best preparation and take care of every little detail. The K3 Lisboa are designed to adapt to the most demanding athletic environments thanks to their Special TAC 1.2 mm polarized interchangeable panoramic lens with anti-fog film and REVO cover. Improved DrySky anti-fog system. Extremely flexible and resistant PC frame. Maximum lightness: they weigh only 27g! Includes hard polyurethane case, microfiber bag and spare bands. Available accessories: photochromic, anti-fog and clear lenses as well as TR90 optical clip.