Our 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. Contoured cork-latex footbed creates custom support with wear Oiled leather upper, colors may vary Suede footbed lining helps keep you comfortable EVA sole is flexible and lightweight Adjustable strap with metal pin buckle “Made in Germany” quality stamp on footbed Material :  Upper material:  Oiled leather Oiled leather is one of our favourite types of leather. Its oily waxed surface makes for a unique colour effect and develops a beautiful patina. The oily finish of our natural leather products results in colour variation, making each and every pair unique. Insole:  Natural leather Natural leather can be recognized by its untreated surface. BIRKENSTOCK purposely does not treat surface grains and other characteristic features. BIRKENSTOCK uses sturdy leather with a thickness of 2.8 to 3.2 millimeters as upper material. Footbed material:  Cork Cork is a sustainable material extracted from the bark layer of the cork oak. This natural product is insulating and offers very good cushioning. Outsole:  EVA EVA (ethylene vinyl acetate) is a high-quality, very light, elastic material with extremely good cushioning. As a result, it smooths out slight irregularities in the floor and ensures that every step is softly cushioned. Protect your shoes with the   Deluxe Care Kit here !