Birkenstock Boston Shearling Clogs. The Boston clog, made cozy for the colder months. Classic suede lends a velvety feel that continues on the inside. The style is fully lined in genuine shearling, right down to the original contoured footbed. A soft, supportive landing every time. Anatomically formed cork and latex footbed. Classic suede upper. Genuine shearling footbed lining. Flexible EVA sole. Adjustable strap with metal pin buckle. Imported.