The revolutionary Subtank hybrid, A first of its kind. Giving your the freedom to switch between kanger's newly designed organic cotton coil heads (OCC) and a new rebuildable atomizer heads. The OCC uses authentic Japanese organic cotton giving you better flavor and a better vape. With just a few twists. you can switch from a convenient vaping experience to getting down and dirty by making your own coils and choosing your own wicks to your pleasure.