The Birkenstock Boston Oiled Natural Leather Clog Sandals are made with great care and attention to detail. The oiled nubuck leather gives a vintage look that will become even more unique over time. The sandals are designed with features like a contoured cork-latex footbed for support, a deep heel cup that cradles the heel, longitudinal and transverse arch support for stability, a raised toe bar to encourage natural gripping motion of the feet, and a roomy toe box for better balance.