The oldest member of the family, BIRKENSTOCK Madrid is a true classic. Launched some 50 years ago as "gym sandals", these sleek one-strap sandals have gradually established themselves as a true fashion companion. The uppers are made of Birko-Flor®, a hypoallergenic, hard-wearing synthetic material. Anatomical footbed in cork and latex Upper: Birko-Flor® Outsole: Suede leather Sole: EVA Details: one strap with individually adjustable metal buckle "Made in Germany"