Birkenstock Soft Foot Bed Clog in Habana Oiled Leather. The most sought-after clog, the Boston lends a fashion-forward edge to any style. Handcrafted for quality, oiled nubuck leather looks distinctly heritage, designed to age over time for a perfectly worn, one-of-a-kind look. Complete with legendary BIRKENSTOCK design elements, like a contoured cork-latex footbed for the ultimate in support.