New with tags. Size 10 women. Birkenstock Boston clog in the color Mocha. This style is a classic, year-round favorite known for its comfort and laid-back look. Here are details and offers for the Birkenstock Boston Mocha: Style: The Boston is a classic clog featuring an adjustable strap with a metal pin buckle. Material: The upper is made of velvety suede leather, and the footbed lining is also suede. Footbed: This specific version (indicated by "Soft Footbed" on the label and in search results) includes an additional layer of cushioning foam between the cork midsole and the suede liner for enhanced comfort. The anatomically formed cork and latex footbed molds to the shape of the foot over time.