It is a flexible transport packaging container. It boasts advantages such as moisture-proof, dust-proof, radiation-resistant, and sturdy and safe, with sufficient structural strength. Due to the ease of loading and unloading as well as handling, efficiency has significantly improved, and its development has been rapid in recent years.

Ideal for shipping bulk powdered materials, it features large capacity, light weight, and ease of loading and unloading. It is one of the common packaging materials. Its characteristics include simple structure, light weight, foldability, minimal space when empty, and low cost.