The Birkenstock Madrid BF LS Sandals are a veritable classic. The single-strap model has gone on to become a firm fashion favourite. Anatomically shaped cork-latex footbed Birko-Flor Upper Suede footbed lining EVA outsole The Birkenstock Madrid BF LS Sandals feature an upper that is made from the skin-friendly, hard-wearing synthetic material Birko-Flor with a shiny coating. The contrasting outsole stands out strikingly against the upper and rounds off the look.