Not everyone can lift fifty-pound sandbags. I certainly cannot do it for hours on end. This is a huge advantage of the military barrier flood system. The barriers are completely lightweight when empty. They only become heavy once you fill them with water or sand right on-site. This makes them safe for anyone to handle, regardless of physical strength. I was able to set up my entire defense line by myself without breaking a sweat. You do not need a large crew or special equipment. It is flood protection that works for real people, keeping your family safe without risking injury.