... ba Poly courier bag, express bag, and mailing bag, express delivery bag, mailer bag, post envelope: materialLDP and HDPE coextrusion ... moisture, shockproof, can be recycled.4) Usage: for post, delivery packing, express delivery, courier mailing and deposit packing.5) Style: with permanent ... be sprayed with serial bar code, also can make a clear pouch on the bag for packing waybill.6) Size: customized ...