Great shoes, very lightly worn. All black leather. Super comfy- same footbed as the sandals. Size 13 US Men, Size 46 EU. From Birkenstock: Simple yet sophisticated! The BIRKENSTOCK Montana features absolutely no stitching thanks to its special construction. The two upper sections are held together by two rivets and the novel lacing. The upper is made from extra thick, oiled nubuck leather with an open-selvage finish.