The BIRKENSTOCK Madrid model is a true classic that inspires the fashion world with its essential design. The Big Buckle variant features a large and elegant pin buckle, a nice detail that stands out on these very simple sandals. The upper is made of fine nubuck leather, fantastic with its natural and rustic look. Anatomical cork and latex footbed. Upper: nubuck leather - Insole: suede - Sole: EVA. Details: a strap with individually adjustable metal pin buckle. âMade in Germanyâ.