Birkenstock Gizeh Braided Leather Thong Sandal You can't ask for a more comfortable choice in a thong sandal. The footbed features a deep heel cup for balance and support, built-in arch support, and a toe bar for the natural gripping motion of your toes. The Gizeh offers the familiar feel of a flip-flop, but with the security and support to keep the foot in a natural, healthy walking position. Good to Know