Ton bag, also known as flexible freight bags, container bags, space bags, etc., is a medium-sized bulk container and a kind of container unit appliances. With a crane or forklift, the container unit transportation can be realized.

It is easy to transport bulk powdery materials. It has the characteristics of large volume, light weight and easy loading and unloading. It is one of the common packaging materials. It is characterized by simple structure, light weight, foldable, small space occupied by empty space and low price.