DELTA-MS is an extremely tough and durable plastic membrane that comes in rolls 3.5, 5.0, 6.0, 6.6, 7.0, 8.0 or 9.8 feet wide and 65.6' long . It has unique "dimples" that serve to provide an air gap between the foundation and the soil around it. The dimples also allow sections of DELTA-MS to be overlapped and interlocked for a waterfast seal.