What do you guys think of using this "Keg Koozy" for insulating my non direct fire mash tun. It's made of Neoprene and has a zipper for easy cleaning and removal and it's supposed to keep the keg cold for 6 hours. I can imagine it would be as good keeping heat in. Neoprene is good to 230* F steady state exposure and 250* intermittent exposure. You can get it without the logo on it. So what do you guys think? It looks as it should work.