This is a quality upgraded version of the 20 cubic feet / 580L capacity roof travel bag. Made of 1000D PVC material, it provides a waterproof interior space for your belongings (in heavy rain, it is recommended to put clothes in an additional dry bag). This product has new waterproof leather strips on both sides of the zipper, and the waterproof curtain outside the zipper is fixed with Velcro. In addition, double seam technology is used to ensure maximum waterproofness! The soft fabric roof storage bag is suitable for most cars with or without roof racks. There are 6 buckles on the outside of the roof bag, and 2 additional long straps are equipped. The double fixing design allows the travel bag to be firmly stabilized on the roof. The foldability of the material allows you to easily fold it into an easy-to-carry size. The roof luggage bag adopts an arched design, which has the advantages of reducing noise and saving fuel consumption through aerodynamic performance. The size of 130cm × 100cm × 43cm can accommodate multiple suitcases, tents, sleeping bags and other items. It is really a great helper for your moving or long-distance self-driving trip!