The Thule Interstate Cargo Bag is Thule's most weather-resistant cargo bag, which has been IP-test-verified for water resistance and boasts sealed seams and a generous storm flap over the three-sided zipper. This cargo bag is ideal for those that need some extra cargo space on their next adventure, offering 16 cubic feet of storage. Twin compression straps keep cargo securely positioned, even in a heavy rain and winds while the padded base protects your vehicle's finish from abrasion while in transit and when you are taking this bag on and off. The Interstate fits Thule rack systems, round bars and most factory racks via heavy-duty, double-stitched webbing straps (included). When not in use, the Interstate folds down easily into its included stuff sack for handy storage under a seat. Heavy-duty molded handles let you throw the rooftop cargo bag around with ease once you reach your destination.