Oh boy! I am liking all the responses I am hearing so far to "just go for it". I have a stack of old sweatshirts and towels that have seen quite a bit of use. I think I can get a middle out of each stack.
And - I am liking the idea of old flannel sheets (why didn't I think of that...duh..) and those "sheet blankets".
More good ideas!
amma - ty for the tip about zigzagging the edges together - Is that to prevent bulgy seams I take it??