The BIRKENSTOCK Madrid is a genuine classic that delights the world of fashion with its minimalist design. This popular sandal has been given an update in a new material, with a vegan version now available. It is entirely free of animal products, as verified by independent testing laboratories. The upper is made from a skin-friendly, synthetic material with a velvety feel. Anatomically shaped cork-latex footbed Upper: synthetic material Footbed lining: microfiber Sole: EVA Details: strap with an individually adjustable metal pin buckle; vegan Made in Germany Material Insole: Microfiber Microfibers are a very fine synthetic fibers that are extremely soft and shape-retentive. Because they are free of animal products they are used as the covering material for the lining of footbeds in vegan products, among other things. Footbed: Natural cork Outsole: EVA