This is not the sort of project that would normally appeal to me, but it was a special request by a friend who positively assured me that she would actually wear such a hat. More than once. In public.
In a what-was-I-thinking-in-the-middle-of-the-night moment, I started knitting with worsted weight yarn on US 2 needles, producing a fabric which stands on its own and could possibly be substituted for Kevlar. To make things worse, I used dpn's because I didn't have any circular needles in that size. Very soon I had to move one quarter of the stitches to a holder because they were falling off the needles, and I became rather adept at substituting needle for holder on every round.
I just finished felting my second hat, and wanted to post some photos. The first is a tiny little brimmed hat. I made it small to start so as not to use too much wool if it didn't work out. I was very pleased with the results and am going to do a full sized one just like it. The second was the Garden Hat from the book "Felted Crochet." It was huge before felting. My daughter Kate tried it on for the before picture. I was pleased with the results, but I don't think I'll use the same yarn again. It was crocheted from Brown Sheep Lamb's Pride Worsted. It's 30% mohair, so the final product is extremely fuzzy. My older daughter, Erin, loves the fuzz, and the hat is for her, so it all turned out for the best. I'm going to add a band of embroidered ribbon to finish it off.