birkenstock women's gizeh soft cork footbed thong sandal bge flwrs 37 medium eu birkenstock the gizeh birko-flor beige flowers thong sandal from birkenstock with a cushioned orthotic footbed provides excellent arch and metatarsal support. durable eva outsole, cork footbed molds to each individual foot to provide a custom fit. this birkenstock sandal is a genuine classic, emphasizing the handcrafted and natural look of stylish sandals. a comfort legend and a fashion staple.