I tried a small experiment a few days ago - a cowl that can also be used as a hat. I used cotton-cashmere yarn that I dyed a couple of months back. My notes are below as well as progress photos and the finished item. I am not very happy with it as a hat but very pleased with it as a cowl. I think a much better design can be made.

The notes, drawings and photos show how I made the Cowl-Hat. I used 3.5mm hook and cotton-cashmere yarn from Lotus Yarns.