Upper: 60% Leather Bovine Nappa-40% Textile Elastic Nylon, Lining: 72% Textile Woven Polyester-28% Synthetic Polyurethane, Sole: 100% Termoplastic Rubber. The classic Geox rubber sole is based on an exclusive patent: the combination of the perforated sole and resistant breathable and waterproof membrane allow for natural temperature regulation, thereby keeps feet dry and comfortable for the whole day.