The BIRKENSTOCK Honolulu is a sporty thong sandal with embossed straps. Modeled on the cork sandal, this sandal is made from light, flexible and waterproof EVA. Anatomically shaped BIRKENSTOCK footbed made from EVA Upper/footbed lining/sole: a single piece of EVA Details: waterproof, washable, ultra lightweight “Made in Germany” *These tend to run a little big. I am generally a size 7, but the "37" fits me perfectly.