Review on COOCHEER 20 Cubic ft Car Roof Bag: Weatherproof Rooftop Cargo Storage for Traveling, SUVs, Vans, and Cars with Racks by Steven Asthana

We drove this vehicle tied to my 2018 Santa Fe on the freeway for about 26 hours and stopped in 3 cities to unload/recharge. I used crossbars because my roof rails are flush and I didn't want to run the straps through the car. The product arrived with 2 long straps and 4 short straps that had no stop at the ends so just tension held them in place. Buckles and no instructions. Loops are sewn into each corner, which we tied to the crossbars with shorter ribbons. We crossed the longer straps over the bag attached to the rails. It didn't feel very secure, but we never felt any movement on the road, except you really have to check the straps are tucked well or they'll roll down the roof. 1 smaller skateboard and 2 large gift boxes. It was difficult to zip up, but there was still room for soft items. It rained on our trip but I can't confirm the weather protection as my dear husband left it partially open after unloading it so the water was already in the bag when we loaded it back but I think would have been otherwise it been dry. After that, we basically put the bag back in the suitcase. It is possible.