Birkenstock Arizona Big Buckle Cognac Oiled Leather, US W6/M4, New in Box Description An icon of timeless design and legendary comfort, the Arizona sandal has been defining style since 1973. Updated in oiled leather and gleaming big buckles, this pair is designed to break in beautifully with wear. Heritage finish above, contoured footbed below. 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 Smooth leather footbed lining Flexile EVA sole Two straps with oversized metal pin buckles Made in Germany Material 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.