PP woven dunnage bag are stronger and waterproof. Fill the voids in container PP woven bagWhat are they used for? Ameson Dunnage Air Bags are used to restrain movement of cargo loads in Trucks, Overseas Containers, Intermodal Shipments, or Rail Cars. They fill voids, brace loads, absorb vibrations, and protect cargo from in transit damage, better than any other form of bracing (“dunnaging”) ...