Versatile spill containment berm uses replaceable foam supports to minimize service and maintenance. The ability to drive in and drive out of a containment berm makes daily operations much simpler and hassle-free. Foam sidewalls are an exceptional way to provide structure to a berms sidewalls while allowing effortless entry and exit. But foam doesnt last forever. The removable foam supports in the Ultra-Containment Berm, Foamwall Plus Model makes replacement of old or damaged foam, quick and easy. Simply pull the old one out and slide the new one in.