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 various 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 are widely used for the packaging and bagging of various items, particularly in industrial applications. They are made primarily from polypropylene resin, which is extruded and stretched into flat filaments before being woven and bagged. Composite plastic woven bags are produced by coextrusion of plastic woven fabric. They are used for packaging powdery or granular solid materials as well as flexible items. Composite plastic woven bags are categorized into two-in-one bags and three-in-one bags based on the primary material composition.