"Gretel" in a sport weight wool. This one has gone through all four of my kids, despite having been felted during the tenure of Child No. 2. He was wearing it while playing in a firepit in Yellowstone Park. Needless to say, one could hardly have called it light blue by the time he was done. So, after multiple attempts at washing it by hand without success, we finally threw it in the washer and it got clean, and felted. (I didn't know how to felt at the time, so I also didn't know how to not felt at the time).