New without tag Size 8-8.5US An icon since 1963, the Madrid redefined sandals with its contoured footbed and a single, sophisticated strap. A gleaming big buckle accessorizes the style to stand out against glossy natural leather. The style is grounded in our original contoured footbed, which we've wrapped in ultra-smooth leather for a luxe experience every time. - Contoured cork-latex footbed creates custom support with wear - Natural leather upper with high-shine finish - Footbed lined in smooth leather for a luxe touch - Flexible EVA sole - Adjustable strap with oversized metal pin buckle - Made in Germany Upper material: Natural leather This type of leather has a shiny patent look but nevertheless boasts all the special characteristics of natural leather. These include adaptation to the shape of the foot and durability. Insole: Natural leather Natural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material. Footbed material: Cork Cork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning. Outsole: EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with extremely good cushioning. As a resi smooths out slight irregularities in the and ensures that every step is softly cushioned