The product is fairly lightweight and the 'roll' ridges haven't yet flattened out (although they might if I let it sit in the sun on the driveway), but it seems to be filling the bill.  Bought it because I have to transport someone by wheelchair over new wall-to-wall carpeting throughout the day and I wanted to protect the carpet from the wheelchair wearing a path.  It's wide enough and lies flat as I roll over it.  No odor.  Great price (way better than others I'd considered).  Very happy thus far.