Gugel – Wikipedia

Description. It was tailored to fit the head and shoulders, and was usually made from wool or loden. Originally worn by commoners, it became fashionable with the nobility from the 14th century. In the fashionable style, the gugel was worn on top of the head like a hat, with the head-part inverted inside the collar, which then hung over the ears.

https://en.wikipedia.org/wiki/Gugel