"The BIRKENSTOCK Madrid is the oldest member of the family of models, making it a veritable classic. Launched as a “gymnastics sandal” half a century ago, this simple single-strap model has gone on to become a firm fashion favorite. The Big Buckle Hammered version is unmistakable with its large, elegant pin buckles and hand-hammered design. An impressive and distinctive eye-catcher on this otherwise understated sandal. The upper is made from high-quality natural leather with a shiny patent coating."