I would like to make a hat that looks roughly like this one but I'm clueless on how to go about with it.
I need it to be from a material that does not keep heat much (compared to, say, felt) and that won't deteriorate if it gets damp (like paper does). I thought I might use rough canvas, but I'm not sure if it will stay in shape if just sewn. So:
What would be a suitable cloth material to use? Would canvas be alright?
How do I make it stay in shape without making it too thick — should I use wire or fishing cord, do I need something to make the cloth stiffer (if so, what would it be), would sewing it properly be enough?