Here's a picture of mine. I should have said a tyvek like material, as I have no idea what it really is. It just reminds me of tyvek. One thing I like better about this cover over the tarp, is that water seems to evaporate quicker from it than the tarp. The tarp becomes a lake and stays a lake. The car cover is a lake for a little while, then evaporates. We had a horrendous dust storm several weeks ago. It made of huge mess of everything. The fine dust did blow through the car cover a bit. I shudder to think what the raft would have looked like with no cover.
"We are all visitors to this time, this place. We are just passing through. Our purpose here is to observe, to learn, to grow, to love....and then we return home."
Australian Aboriginal Proverb