Abstract: A display device system preferably made of flexible material for the removable, changeable displaying of bumper stickers and related indicia on vehicles and the like. The improved system includes a rectangular display sleeve having a transparent outer wall with a like configured, rectangular base member joined to the sleeve member by a heat seal at their side edges. The base member on its rear face includes an adhesive surface for adhering the display device to the vehicle. The sleeve member utilizes a flexible, zippered sleeve or envelope with a transparent front, with the display indicia item being inserted into the sleeve through the zippered edge, which is thereafter zippered closed. The base and sleeve members form an accordion-type fold, in which the fold faces are adhered together during use using an adhesive with lesser holding strength than that used to adhere the base member to the vehicle.