The oldest member of the family, BIRKENSTOCK Madrid is a true classic. Launched some 50 years ago as "gym sandals", these sleek one-strap sandals have gradually become a true fashion companion. The upper is made of Birko-Flor®, a hypoallergenic and durable synthetic material, in a nubuck style, resulting in a texture and color very similar to real leather.Anatomical cork and latex footbedUpper: Birko-Flor® nubuckOversole: Suede leatherSole: EVADetails: a strap with an individually adjustable metal buckle "Made in Germany "Upper: Birko-FlorBirko-Flor nubuck consists of a hygienic, easy-care PVC plastic; its inner side is bonded to a soft, thermoactive non-woven layer. The surface is similar to nubuck leather. This high-quality material is skin-friendly and provides a very comfortable fit.Insole: InsoleThe hypoallergenic and flexible leather insole gently hugs the foot and adapts to its contours. The open-pore surface is particularly thermoactive and keeps the feet at a pleasant temperat...