RIBS provide the best value for height achieved by any individual unit and are among the easiest soil filled barriers to remove on the market.  They are comprised of a heavy-duty, woven, polypropylene coated fabric for a water resistant seal and the unique trapezoidal design creates a downward “sealing” pressure; RIBS bags seal tighter as water gets higher.  They have been tested and approved by the USACE for flood defense operations.