What's wrong with polyester? I was taught at a LQS that it is the best if you want to keep your work looking like it did when new. I love it and use it most of the time, except for small items and then I use something similar like warm & natural or pellon iron on. I like Hobbs polyester and Connecting Threads has it and puts it on sale a lot. They have most anything in the batting line and they're very reasonably priced.