... & tearing resistant c.customized size,logo d.Waterproof & recycle plastic postage bagscourier bag and mailing bag, express delivery bag, ... copperplate and offset printingFeatures and Specifications:1>material: HDPE, LDPE coextrusion material, outer-white and inner-black or grey ... materials: PO, PE, OPP, PP, PVC, CPE, PO/PE and composite material, non-woven fabric eco-friendly materials, biodegradable ...