Outer Composition Calf Leather: 100.0%, Lining Composition Calf Leather: 100.0%, Inner Composition Polyethylene Vinyl Acetate (peva): 54.0%, Sole Composition Silica: 26.0%, Sole Composition Rubber: 50.0%, Sole Composition Thermoplastic Polyurethane (tpu): 5.0%, Sole Composition Other Materials: 19.0%