The BIRKENSTOCK Siena boasts a refined appearance. Crossed straps give the sandal its unique and special look. The tonal footbed rounds off the shoe’s look of sophistication. The upper is made from high-quality nubuck leather. Anatomically shaped cork-latex footbed Upper: nubuck leather Footbed lining: microfiber Sole: EVA Details: two straps, one with an individually adjustable metal pin buckle; tonal footbed Made in Germany