At any rate, when my ballcap soaked through I remembered the brand new Horicon Marsh Hat I had tucked into my parka pocket. I put it on and the effect was almost instantaneous - just like in the video. I felt as if I had put an electric heater on my head. For the rest of the hunt, my head stayed warm and dry although from the neck down I was miserable. The Horicon Marsh Hat is not stylish, it needs bigger earflaps, and it's a little pricey at $45, but it would seem Columbia may be onto something with this technology.