Birkenstock Boston Chunky Clogs. A chunky platform sole takes the Boston clog's iconic design to new heights—and your style along with it. Velvety suede feels as classic as the original, with fresh perspective from the statement platform below. Designed around a contoured footbed, this style feels better and better with wear. Contoured cork-latex footbed creates custom support with wear. Classic suede upper. Suede footbed lining. Platform EVA sole: 1.25". Adjustable strap with metal pin buckle. Imported.