Incredibly stylish and 100% comfortable, the Boston BS closed toe sandals from Birkenstock will make you stay on the move all day long. Encouraging foot health and maintaining a natural posture while walking, the Boston open-back sandals are a light and summery companion that offers outstanding comfort. Durable suede leather upper. Soft leather lining for comfort. Anatomically correct natural cork-latex footbed. One adjustable buckle closure for secure fit. Flexible, lightweight and shock-absorbing EVA sole.