Our motion for domestic express company, foreign Courier company DHL, UPS and EMS parcel bag manufacturers specified. 1. The selection of materials: using single or multi-layer co-extrusion, LDPE and so on glue stick choice: once the glue stick or repeat use ordinary glue to stick the envelope bag (2) product features: waterproof, prevent oil, laceration resistant, resistance to wear and tear, does not add any additives of heavy metals in the process of manufacturing, chlorine and other harmful environmental elements. 3. Product promotion: custom bag bag can better promote the products sold by you, relaxed and raise their added value of products, product is also in the process of delivery to achieve the effect of secondary propaganda。