The Arizona is Birkenstock most classic style that s been loved for decades for its simple and comfortable design. Synthetic yet hardwearing Birko-Flor is to form the two-strapped uppers while a moulded EVA sole sits underfoot. Birko-Flor Uppers , Suede Lining , Adjustable Straps, Cork-Latex Footbed, EVA Sole, Made in Germany. Birkenstock Arizona Black.