I have just started wool appliqué also and just love it! The hand work is going to be great to do when we are out traveling and camping. I get all of my wool from Goodwill also! I check to be sure the labels say 100% wool. I wish there was a way to check for the wool content in the store. Some garments don't have their labels anymore and I THINK they are probably wool by the feel and look of them, but I am not sure. I don't want to spend the money and then find out it is not all wool.