The Yakima GetOut Bag fits nearly any roof rack system so you can load up and hit the road in a snap.
The Yakima GetOut Cargo Bag makes it easier than ever to gear up and go. When it's road trip time, use the oversized pull tabs to open the GetOut Bag and load up its voluminous 13 cubic foot interior. Lift this Yakima cargo bag onto the roof of your car and secure it to your rack—it fits round, square, and most factory racks—or your vehicle's raised side rails. As the miles disappear, you'll feel confident that your gear is safe and secure on the roof—looped straps prevent the GetOut Bag from sliding around. Yakima sealed all seams to bolster weather resistance and gave the GetOut Bag lockable zippers for convenience.
Yes, this bag attaches to the side bars with straps. I would not put more than 100lbs in the bag. Even in the arodynamic storage boxes made by Yakima they recomend not putting more than 100-150lbs inside.