Ursula (Swiss red horsehair/natural crown)
The brim is just over 4 inches in front and 3 in the back. There is one pleat to add some curvature to the brim. Horsehair holds up so well, can be packed as long as you fill the crown with some clothes first. The crown is hemp straw, breathabl and light.
Urusla is one of the sisters in the book by D H Lawrence, Women in Love. They were fashion foward for their time.