The Thule OutBound Roof Bag, part # Th868 Has the same material on the bottom. While it is made to sit on the roof when needed, I would suggest a clean surface, a fresh coat of wax, and a Non-Skid Roof Protection Pad for Rightline Rooftop Cargo Bags, # RL100650.
The only sure way to prevent the possibility of the roof being scratched would be to use a cargo basket or box. view full answer...
The Rhino-Rack Rooftop Cargo Bag # RRLB200 is made of a poly canvas tarpaulin which is going to be a flexible material, not a hard rigid surface.
The confusion is likely because the Rhino-Rack Rooftop Cargo Bag # RRLB200 is designed to be used on a roof platform or roof basket which would be rigid. It is not designed to be used as a stand alone product with just crossbars or nothing on the roof. view full answer...
The Advantage SportsRack cargo bag # HE3021 is made out of a Heavy-duty, vinyl-coated, 600-denier polyester. This keeps it from ripping easily and helping to keep water out. view full answer...
Roof mounted cargo boxes are weather resistant, but not waterproof. Under severe weather conditions it is possible that some moisture could get into the box.
If you have something that absolutely cannot get wet, then we recommend putting it in a waterproof package first such as a sealed plastic bag before loading it in the carrier.
I included a great video review, picture and informative article for you too. view full answer...