The Evergreen of our Duca del Cosma mens collection: the Kuba is made with of a soft, full-grain waterproof leather. The Waterproof Bootie System of the Kuba has a breathable and waterproof membrane, which keeps feet dry. The Kuba is fitted with an ergonomic, comfortable and removable Soft PU insert sole. The Kuba has the Airplay Skyflex Outsole which has an anatomically designed S-channel running through the outsole to ensures optimal traction during downswing and a natural walking motion.