What is the term for inexpensive or waste material used to protect and secure cargo during transport?

The term for inexpensive or waste material used to protect and secure cargo during transport is dunnage. Dunnage can consist of various materials such as wood blocks, foam, air pillows, or even recycled materials that help to fill voids in shipping containers and prevent movement, thus ensuring the safety of the cargo. Its primary function is to minimize damage during transport by providing support and cushioning to the items being shipped, which is particularly important in logistics to maintain the integrity of the goods and reduce losses from damage.

Freight generally refers to the cargo being transported or the fee charged for transportation of goods, while padding often describes materials specifically designed for cushioning but do not encompass the broader category that includes waste materials. Tarpaulin, on the other hand, is a protective cover used to shield goods from weather elements, but it does not serve the primary role of filling gaps and securing items inside a transport vehicle.