Birkenstock Callan slip-on shoes feature a premium navy blue suede upper with a versatile collapsible heel, allowing them to be worn as both a shoe and a clog. Designed with the signature anatomically shaped cork-latex footbed, these loafers provide exceptional support and comfort for all-day wear. The lightweight EVA sole ensures durability and grip, while the elastic inserts at the sides allow for an easy, flexible fit. These shoes are in excellent pre-owned condition with light wear on the outsoles.