Anatomically shaped cork-latex footbed Upper: Birko-Flor® Footbed lining: suede Sole: EVA Details: one strap with an individually adjustable metal pin buckle Made in Germany Upper: Birko-Flor Birko-Flor is made of easy-to-care-for and hygienic PVC, which has been lined on the inside with a soft, breathable layer of fleece. This high-quality material is very gentle on the skin, and it’s comfortable while also being very durable. Birkenstock Madrid Black Birko-Flor Sandals (Narrow)