Birkenstock Arizona Essentials EVA Red Size 38 / 7-7.5. The BIRKENSTOCK Arizona is a true classic. Modeled on the cork sandal, it is made from ultra light and highly flexible EVA. The high-quality, odor-neutral EVA has been tested for harmful substances and combines numerous positive attributes. It's waterproof, ultra lightweight, washable and therefore extremely easy to care for. Anatomically shaped BIRKENSTOCK footbed •EVA upper / lining / sole one-piece EVA •Waterproof washable, ultra lightweight Gentle use, excellent preowned condition—little or no wear to the sole (some fade to the internal insignia). See photos for details.