The Birkenstock Boston Oiled Natural Leather Clog Sandals are crafted with quality in mind, using oiled nubuck leather that will develop a unique patina over time. It features classic design elements such as a contoured cork-latex footbed for support, a suede footbed lining for comfort, an EVA sole for flexibility and lightweight feel, and an adjustable strap with metal pin buckle. The deep heel cup provides cushioning under the heel bone, while the longitudinal and transverse arch supports promote stability and proper alignment. Additionally, the raised toe bar encourages natural gripping motion, and the roomy toe box allows the toes to move more freely.