Review on Zone Tech Classic Black Durable Roof Top Waterproof Cargo Bag - Premium Quality Universal 15 Cubic Feet Fold-able Leak Proof Traveling Roof Top Car Bag by Sirious Cavalli

My bag fits between TWO rails. I don't have 4 rails so I have to wrap zip ties around the same ones. We attached the hooks to the opposite bait. Didn't give in. This bag contained: 3 honey. (on wheels with handles) suitcase, travel cot, gym bag, book bag, pillow and a blanket or two. It was full. If it had a base at the bottom maybe it could lean on my rails and I could slide a few more things in. The zippers are strong, as is the bag itself. It rained on our trip and everything stayed dry. He was resting on the roof. They are selling floor mats for the roof of your car but I have not received any. On our trip were 4 adult women and a three year old child. We had a lot of stuff and this stuff holder worked! I recommend!