Bought to use under my RoofBag for the 1000 mile round trip from New York to the Outer Banks. It's basically just an oversized piece of non-slip material that can be used for drawers/cabinets. Although the dimensions were in the product description, it wasn't as big as I would have liked. It did the job though, protecting the roof of our car and keeping the roof bag in place the whole time. It seems a little pricey to me, but then again I can't complain because it worked. I would recommend this if you are buying a roof bag for any type of trip.
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