Woven bags, also known as snake skin bags, are a type of plastic bag used for packaging. Their raw materials are typically polyethylene, polypropylene, and other chemical plastic materials. The color of woven bags in Shijiazhuang is usually white or light gray, odorless and non-toxic, causing minimal harm to the human body. Although made from various chemical plastics, they are environmentally friendly and have a strong recycling effort.

Woven bags have a wide range of applications, primarily used for packaging and wrapping various items, with extensive usage in the industrial sector. Woven bags are made from polypropylene resin, which is extruded and stretched into flat filaments, and then woven and bagged. Composite plastic woven bags are made by laminating plastic woven fabric using the cast film process. They are used for packaging powdery or granular solid materials and flexible items. Composite plastic woven bags are categorized into two-in-one bags and three-in-one bags based on the main material composition.