Made from the same material as mesh sponges, this is basically a tube made from multiple layers of mesh.  One end is permanently closed and the other end has a cord and spring loaded stopper that allows it to be opened and closed.  Just slip your soaps in, close the top by pulling on the cord, and you are ready to go.  The net mesh is wonderful for exfoliating action and you simply hang to dry with the soap still in it.