It was another just-go-for-it project but I wasn't so lucky this time... only half of the yarns felted! The hat did not shrink in height at all! The rim that I crocheted turned into an hideous ruffle! After the feeling of defeat and frustration subsided, I decided not to toss it but to try to come up with a solution.
I decided to just cut it to the right height at one of the felted parts since I knew that it wouldn't unravel here. The parts that didn't felt were thin and left large holes which left my head cold so I decided to weave in extra yarn.