The Yakima Dry Top provides an easy to use, instantly deployable storage solution for vehicles with and without roof racks. Its 16 cubic feet of storage makes it great for weekend excursions and long distance road trips alike. Adjustable straps attach directly to the roof of your vehicle, bolstering heavy loads for a secure, stay put fit, even during heavy crosswinds encountered at highway speeds. And when you're finished using the DryTop, quickly roll it up and stash it away to reduce unwanted drag and loss in gas mileage associated with other roof rack setups. Tougher and more weather resistant than Yakima's SoftTop bag, the DryTop is made from heavy duty ballistic nylon, which protects the roof of your vehicle from scratches. However, because this bag isn't fully waterproof, we recommend storing sensitive items within a waterproof plastic bag during soaking rains and all day deluges.