Oiled leather only looks better with wear, giving each pair a unique, well-traveled patina. With an original contoured footbed for support, it\'ll feel uniquely yours wherever you take it. * Contoured cork-latex footbed creates custom support with wear * Oiled leather upper gives each pair a unique finish * Suede footbed lining helps keep you comfortable * EVA sole is flexible & lightweight * Two straps with adjustable metal pin buckles * Made in Germany details about product materials Upper material: Oiled leather Oiled leather is one of our favourite types of leather. Its oily waxed surface makes for a unique colour effect and develops a beautiful patina. The oily finish of our natural leather products results in colour variation, making each and every pair unique. 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 result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned.