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 tasteless, with minimal harm to the human body. Although made from various chemical plastics, they are highly environmentally friendly and have a strong recycling effort.

Woven bags have a wide range of applications, primarily used for the packaging and assembly of various items, with extensive use in the industrial sector. Woven bags are made from polypropylene resin, which is extruded and stretched into flat filaments, then woven and bagged. Composite plastic woven bags are made by laminating plastic woven fabrics using the casting method. 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 main material composition.