The Birkenstock Boston Oiled Natural Leather Clog Sandals are carefully made with high quality, oiled nubuck leather that looks vintage and will develop a unique, worn-in look over time. It comes with a signature design featuring a contoured cork-latex footbed for support and cushioning. The sandal also has an adjustable strap with a metal pin buckle and a deep heel cup that helps keep your natural cushioning close to the heel bone. It has longitudinal and transverse arch support to provide stability with each step, a raised toe bar to encourage a natural gripping motion, and more toe room for better balance and foot alignment.