The Birkenstock Arizona SFB Unisex Black Sandals are feature a sleek, all-black colorway, with two adjustable straps that allow you to customize the fit to your foot. The upper of the sandal is made from Birko-Flor, a synthetic material that is both durable and easy to clean. The lining of the sandal is made from a soft, suede-like material that feels comfortable against your skin. The footbed of the Birkenstock Arizona SFB Unisex Black Sandals is made from cork, which is a natural material that molds to the shape of your foot over time. This creates a custom fit that offers excellent support and comfort. The outsole of the sandal is made from EVA, a lightweight and flexible material that provides excellent shock absorption and traction.