The BIRKENSTOCK Madrid is a genuine classic that delights the world of fashion with its minimalist design. This popular sandal has been given an update in a new material, with a vegan version now available. It is entirely free of animal products, as verified by independent testing laboratories. The upper is made from the skin-friendly, hard-wearing synthetic material Birko-Flor in a sophisticated nubuck look which boasts a texture and color that could almost be mistaken for real leather.