A Roof Mounted Cargo Bag's molded base design provides the same protection as a cargo box but it can be tucked away after use. Although a Cargo Bag will provide protection for you gear against the elements, they are not waterproof. We always recommend for things you would like to keep dry to place them inside a waterproof container such as a garbage bag. Being that cargo bags are made from material, they can be very flexible with what you can fit inside from roller luggage to duffle bags.
Thule Cargo Bags offer all the advantages of a rooftop box but require a fraction of the storage space. They are great for using only when needed, quickly installing or removing, and compact storage for when they are not in use. Thule Roof Mount Cargo Bags provide storage capacities varying from 12 all the way up to 17 cubic feet. Generally constructed from water-resistant durable nylon these bags are built to last you a lifetime.
Yakima Cargo Bags are an affordable and convenient alternative to hard-shell cargo boxes. They are lightweight, easy to put on and take off your car, and they collapse for compact storage. Some Yakima Roof Mount Cargo Bags even double as a backpack, luggage or for storing stuff at home. They also make great picnic baskets for pet elephants. In terms of available storage capacities, Yakima offers models within range of 7 to 13 cubic feet.