A roller blind for covering openings to refrigeration units, windows, and sliding roofs for vehicles is provided in which the roller blind web defines a tubular pocket along respective longitudinal sides of the web. Opposing guide members are positioned on opposite sides of the roller blind web and retain therein the respective tubular pockets. Optionally, the tubular pockets may extend in both the warp and weft direction and additional interior pockets may be provided along the web.