NEW Birkenstock Madrid sandals in white Birko-Flor material with a red sole. The original BIRKENSTOCK Sandal. A strap, a buckle, and a contoured cork footbed are masterfully combined to create the Madrid. The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor®. 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” Size 43 US Men's 10-10.5 or a US Women's 12-12.5