Madrid 1 Bar Mule by Birkenstock The Madrid mule by Birkenstock features a classic design, contoured cork footbed, single synthetic strap and a buckle fastening. - Black birko - Synthetic upper - Suede lining - Cork and natural latex sole - Narrow fit - Please note this product is excluded from the Free delivery over £50 offer About Birkenstock “The mastery of shoe making and the devotion to bring style and comfort to the people have persisted from one generation to the next” Over many generations, the Birkenstock company has gathered extensive knowledge in the area of foot health. This knowledge and experience is the foundation of their proven, high quality Birkenstock sandals and shoes.