Abstract: A fastening system is provided that is especially suitable for securing flexible automotive and truck body covers, and in particular tonneau covers, to truck bodies. The system employs cooperating hook and loop type fasteners with a cover member that protects the hook and loop fasteners against weathering, entry of moisture dirt, etc., and also provides an enclosure along the cover edge to prevent peeling separation under the effect of wind whip. The system can also include a locking closure to prevent unauthorized removal of the cover. Preferably a strip of hook and loop fastening material is mounted on a replaceable strip mounted in a channel in an extruded base member which is bonded to the vehicle side upper edges; a resilient layer can be interposed to accomodate irregularities. A second hook and loop strip is fastened to the underside of the cover member which is pivotably attached to the base member.