The Birkenstock Boston. made Exquisite. The sophisticated. individual design means the Boston can be worn all year round. giving this style a legendary status for seasonal versatility. Equipped with a strap and buckle that can be adjusted across your instep the Boston clog provides a secure fit. Soft aniline nubuck leather lends a premium feel to our most-loved clog. The style is grounded in a contoured cork footbed. made luxuriously smooth by an exquisite leather lining.