Women's Birkenstock Boston Big Buckle Narrow - Sandcastle Nubuck Bigger buckle, bolder Boston. We expand our wildly popular Big Buckle collection to welcome our most iconic clog—the Boston. An oversized, gleaming buckle adds the perfect statement piece to the classically laid-back look. On a contoured footbed that'll feel uniquely yours wherever you wear it. DETAILS: Contored cork-latex footbed creates custom support with wear Premium nubuck leather upper Suede footbed lining helps keep you comfortable EVA sole is flexible & lightweight Adjustable strap with oversized metal pin buckle Made in Germany