Abstract: A covering arrangement for the cargo area of a truck defined by trolley assemblies positioning overlying covering fabric in a sealing relationship with the cargo area. The trolley assemblies, each typically driven by a chain, are propelled forwardly and rearwardly in an uncovering and covering relationship. The rear portion of the cargo area is covered by a fixed and/or independent fabric which includes a laterally extending cushioned bar. Another cushioned bar, locataed at the rearmost end of the movable covering fabric, selectively engages the other cushioned bar to present an effective sealed relationship. Resilient means secured to the trolley assemblies continually urge the covering fabric into a sealed relationship with the top edges of the side walls.