Way more than a simple marketing gimmick, the process of “French-milling” actually turns ordinary suds into smooth, velvety soap lather fit for a monarch. What makes it unique? It’s the manufacturing process, in which raw soap actually passes through steel rollers multiple times. This process is often referred to as “triple-milling” because the soap makes three passes before being molded into its final shape. The booze analogy is helpful here: In the same way that each successive distillation further purifies a spirit, evening out both the aroma and flavor, the result of the steel rolling results in a finer, more dense, and more smooth bar of soap.