Oh, I just spent yesterday making two pototo bags. Now I made sure I used 100% cotton material, muslin for the inside and 100% cotton batting. My only issue is, did I use 100% cotton thread? Didn't think of thread. I embrodieried on the front, here again, not sure, will have to go look, but 100% cotton thread, I don't think so. Oh gee, I washed it and everything. I may have to start all over!