Weatherproof Luggage Carrier is a heavy-duty- black nylon carrier that is easily installed. It features a covered zipper opening- lined seams and sew-in tie-down straps- providing 11.2 cubic feet of additional storage space. Depending on your vehicle- this Luggage Carrier can be used with Roof Rack Cross Bars- Sport Utility Bars or Removable Roof Rack. Black Weatherproof vinyl- 36inx46inx15in 4 tie down straps. May require sport utility bars to act as tie down points.