Birkenstock Boston Soft Foot Bed Sandals in Black. One of, if not the most iconic sandal silhouettes around; These Birkenstock Clogs deliver both laid-back style and undeniable comfort. This iteration of the model features a supple suede upper with single buckle fastening, while underfoot the brand's signature cork soft footbed contours to the foot offering a supportive, ergonomic fit. Both the Metal buckle and rivet, as well as the inner side of the sandal features the German brand's name as a finishing touch.