You'll notice that all the five star reviews go back a couple of years when this bag was obviously made of nylon/canvas and was a quality product.  Since then, the manufacturer has changed it into a cheap piece of plastic material that looks for all the world like a large, and admittedly reinforced, Hefty bag.  It's plastic inside and out with some type of reinforcing fiber woven through it.  Feels like it's about 6-7mil thick.  The accompanying warnings about adding a down piece to your tailpipe should be well heeded because even with the exhaust 7-8 inches away, it will melt this product.Speaking of melting, I have serious doubts about the durability of this product in extreme cold - it will either become too stiff to work with or crack, neither a desirable outcome.  About the only good thing I can say is that it is obviously waterproof with a good zipper system built into it.  Unfortunately, I had to keep it because I actually took it out of the box, thinking that maybe the inside was canvas and they had moved the plastic coating to the outside for better weather protection.  Well, once it's out of the box and opened, I  defy any normal human to roll it back up to the size to fit back in the box!Oh, and the picture of the box it came in is not representative of what is inside the box.  So, Amazon is simply using the advertising literature provided by the manufacturer although they should still remove it from their inventory (or sell it for the $25 it's obviously worth).  Find yourself a higher quality product that will last for more than a few trips and if it costs a little more, in the end it will be worth it.  Unfortunately for me, this is one of the very few products that is the correct size for my rear hitch carrier.Late edit:While the product remains questionable, Amazon came through in their typical customer oriented fashion and made it good with me.  They also promised to look into the issues with the item and delete it from their inventory if appropriate.