Birkenstock Madrid BF Dark Brown sandals for women.The Birkenstock Madrid model is the oldest member of the family, which has established it as a true classic.Launched half a century ago as a ".gymnastics; sandal".,; the purist one-strap model has long since become a stylish accessory.The upper material is made of Birko-Flor®, a resistant and skin-friendly synthetic material.Strap with a metal pin buckle and individual adjustment.Made in Germany.