Gizeh White Birko-FlorBirkenstock's modern thong sandal, the Gizeh, features signature support and a minimalist style, worthy of the title "classic." German made Birko Flor Synthetic and durable upper material with soft backing and leather like finish Cork footbed to conform to the shape of your feet, with pronounced arch support, deep heel cup, roomy toe box. Lined with suede. EVA sole is lightweight for cushion and shock absorption Avoid extreme heat