These aren't my best work, but they're not my worst, and they're all warm in their own ways.
The grey and purple stripe beanie is made with a wool blend for the grey so it's softer and warmer than my usual acrylic. It's also the most understated.
The blues is made with Caron Simply Soft, which is a very soft acrylic, and I held two strands together so it's doubly thick. The earflaps give even more warmth, and the granny square star applique adds a little fun.
I think my favorite is the breast cancer awareness beanie. I got the pattern for the ribbon on Ravelry, and I just made a single crochet cap. I should have done half-double crochets, but I mis-read the picture with the pattern when counting the rows they used. I knew it was too many rows for double crochet, but I didn't remember hdc. Single crochet makes for a denser fabric though, so it makes it warm, so happy accident! I did hdc for the pink rows around the brim, and I made my ribbon with hdcs too since the double crochet version seemed a little too big. The medium pink doesn't look as peach in person. For some reason it didn't photograph that great (imagine that, since I took the photo in my living room under the ceiling fan at night).
I just hope these will fit because I based them on the "average woman head" from the chart I use to size hats. I'm sure it's different when you don't have hair. They could all SQUEEZE onto my head, and I have a huge head. So hopefully they aren't TOO big. We'll see how it goes. I can ALWAYS make more, and I've got a ton of extra yarn floating around that would be great to get use up!