Dunnage is a term used in the logistics industry to refer to low-cost waste or scrap materials used to load and unload cargo during transportation. In trucking, dunnage is any material used to protect and support cargo during transportation by a semi. The primary function of dunnage is to serve as a protective barrier, preventing direct contact between the freight and the surface of a semi-trailer for open-deck shipments. In the case of dry vans and reefers, dunnage can help to prevent multiple pieces of cargo from colliding or rubbing against one another. Dunnage can be made from various materials such as wood, plastic, foam, or paper. The most common dunnage materials are foam, corrugated paper, wood, and plastic. Dunnage is useful because it prevents items from moving and helps to absorb shock during transit, protecting packages from damage. Dunnage is a crucial component of the shipping and logistics industry, and its appropriate use during transportation can help ensure that goods arrive at their destination safely.