fabric-and-synthetic Imported Synthetic sole The BIRKENSTOCK Milano guarantees maximum grip and gives the feet stability in any movement scenario. This is thanks to the slightly more compact upper with two straps and the wide backstrap. The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor. Anatomically shaped cork-latex footbed Upper: Birko-Flor Details: three straps, each with an individually adjustable metal pin buckle; backstrap