... ,customise logo express ba Poly courier bag, express bag, and mailing bag, express delivery bag, mailer bag, post envelope: materialLDP and HDPE coextrusion materialthickness0.05-0.12mmbag ... -woven environment-protected materials, OPP, PP, HDPE, LDPE, CPP, PPU, PVC, PE/PO, PO/PE, CPE and EVA, etc.