The BIRKENSTOCK Gizeh is our classic thong sandal. Modeled on the cork original, this sandal is made from ultra lightweight and highly flexible EVA. These colorful sandals are shock-absorbent, waterproof, and skin-friendly. Wear them at the beach, in the garden, or in wellness and spa areas. It's the perfect addition to your classic BIRKENSTOCK sandals.. Anatomically shaped BIRKENSTOCK footbed made from EVA. Upper/lining/sole: one piece molded EVA. Details: waterproof, washable, ultra lightweight