I really don't know, haven't tried it. I made a fox tail about as thick as the one of my kirin and then added extentions as many as I was able to make. Looked quite good and fluffy, you might wanna try this method,its nt that heavy as foam.
so the plastic hose goes all the way down the wire then you braid the yarn/wool over top, then proceed with sewing on the tufts of yarn/wool? ive never made a yarn tail yet, so I wanted to try this tutorial since it would be perfect for the costume I will be making.