Incredibly stylish and comfortable, the Madrid BS slide sandals from Birkenstock will make you stay on the move all day long. Encouraging foot health and maintaining a natural posture while walking, the Madrid open-back sandals are light and summery companion that offers outstanding comfort. Durable Birko-Flor synthetic upper. Soft fleece lining for comfort. Contoured cork footbed to conform to the shape of your foot. Adjustable strap with metal buckle for a flexible fit. Open-back construction for easy on and off. Anatomically correct, suede lined, natural cork-latex footbed. Raised toe bar to encourage natural gripping motion. Neutral heel profile and deep heel cup to distribute your body weight more evenly. Flexible, lightweight and shock-absorbing EVA sole with bone pattern.