JIL SANDER Nappa Studded Mules $2,390.00 100% Bovine Leather. Select Shoe size: EU 37 EU 38 EU 39 Select Option EU 37 EU 38 EU 39 Add to Cart Description Nappa leather mules with pin metal heel and all-over studs on upper. Featuring exaggerated round toe and calf leather sole with rubber injection. Made in Italy.