Arizona Big Buckle EVA Gray Taupe BIRKENSTOCK Madrid Big Buckle EVA Mauve BIRKENSTOCK BIRKENSTOCK Madrid EVA Big Buckle Sandals in Dark Grey ShoeFreak Birkenstock: Madrid Big Buckle EVA in Gray Taupe J. Cole Shoes. This is a new and modern interpretation of the BIRKENSTOCK classic Madrid. This version features our popular Big Buckle made from a stainless synthetic material and makes an impression with its durability and minimalist design. Modeled on the cork sandal, it is made from the ultra lightweight and highly flexible synthetic material EVA. The high quality, odor neutral EVA has been tested for harmful substances and combines numerous positive attributes: it is very light, highly elastic, shock absorbent, water resistant, and skin friendly. Anatomically shaped BIRKENSTOCK footbed made from EVA Upper footbed lining sole: a single piece of EVA Details: water resistant, washable, ultra lightweight Made in Germany