I did make a couple of sweatshirts for our last trip. They turned out well but were a bit difficult to work with. Also it is difficult to find 100% cotton sweatshirts so some of the colors were more muted than I like. Also, the black on my Mickey heads did tend to run more than on the t-shirts. I think there are a few pictures of sweatshirts posted on the spiral tie-dye thread but it is very long and sometimes hard to look through. Have you tried to do a search? I am an amateur tie-dyer so possibly not the best resource, but let me know if I can answer any questions.
