Gucci Casanova mules in smooth black calfskin, distilling the House's equestrian codes into a sleek open-back silhouette with a sharply squared toe. The gold-tone Horsebit slices across the vamp, while black merino wool lining and a slim leather sole bring a sensual, tactile edge to the iconic Gucci mule. black smooth calfskin front gold-metal horsebit square toe shearling lining open back