It's a headband/earwarmer with Shamrocks across the top. I also have a shamrock doggie sweater, so if you're the sort that likes to match your dog (I'll admit it, I am), then you can have a matched set!
Next I'm working on a sleeveless sweater. It's going to be empire wasted like the last one I did, but with a cool diagonal stitch. I hope that it turns out.