Slider sandals by Birkenstock The Madrid single strap sandal in black comes with an adjustable strap and boasts a synthetic upper set upon a rubber sole for maximum grip. The padded EVA footbed gives an orthopaedic fit that's comfortable for walking.  - Black mono colourway - Synthetic upper - EVA sole - Please note this style has a narrow fit - Vegan Friendly   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.