REESE Explore 1391800 Expandable Rainproof Car-Top Carrier (12 - 16 Cubic Feet) 40 x 38 x 13.5 - 22.5 EXPANDABLE STORAGE: The capacity of this rooftop cargo bag expands from 12 to 16 cubic feet to pack luggage, gear and equipment and anchors down for an aerodynamic fit. RAINPROOF CONSTRUCTION: Made from a premium-quality, rainproof material with sonically welded seams, this carrier keeps cargo dry, clean and protected against dust, dirt, sun and wind. UNIVERSAL FIT: Easily fits on most roof racks, raised side rails or crossbars on a variety of cars, trucks, SUVs, vans and other large vehicles with securing straps. COLLAPSIBLE DESIGN: The soft top REESE Explore Expandable Car Top Carrier folds for easy, convenient storage when not in use and is less expensive than hard shell roof box carriers.