I just replaced the cover on my hot tun and am about to throw away the old one, but I thought I would offer it up to anyone at my local hacker spaces in case anyone has a use for it. There are 2 halves, each a bit less than 4x8 feet and about 4" thick. It's made of some sort of medium density closed cell foam covered in a vinyl fabric of some sort which is easily cut off. Let me know if you are interested. I can drop it off for you anywhere nearby. If I don't hear, it goes to the dump on Tuesday. -- -steve