... -static,customise logo express ba Poly courier bag, express bag, and mailing bag, express delivery bag, mailer bag, post envelope: materialLDP ... printed plain, as per your logo artwork design.3) Material: LDPE or HDPE coextrusion material, outside-white and inside-grey color ... composite materials, non-woven environment-protected materials, OPP, PP, HDPE, LDPE, CPP, PPU, PVC, PE/PO, PO/PE, CPE and EVA ...