This papercraft is a Südwester, a waterproof hat for seafarers, designed by Gentlemen’s Report. It is made of cloth or plastic oil as upper material and partly as a feed cotton. Südwester have a wide brim, which hangs behind far, so rain water can not run into the clothing. The designation by the direction from which most of the rain is coming, possibly as well as the hat itself from Norwegian.
You can download the paper model template here: Südwester Waterproof Headgear Free Papercraft Download