... Printed mailing bags a.OEM,ISO9001:2008,SGS b.Durable & tearing resistant c.customized size,logo d.Waterproof&recycle custom Printed mailing bagscourier ... bag and mailing bag, express delivery bag, mailer bag, post ... shockproof. 7.kinds of raw materials: PO, PE, OPP, PP, PVC, CPE, PO/PE and composite material, non-woven fabric ...