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 gym sandal, this purist one-strap model long ago became a stylish accessory.In this version it stands out for the metallic shine effect.The upper material is made of Birko-Flor®, a resistant and skin-friendly synthetic material.Anatomically shaped cork and latex insole Upper material:Birko-Flor® Insole upper layer:suede Sole:EVA Details:strap with a metal tang buckle with individual adjustment Made in Germany.