What is "bollenhut"

A Bollenhut is a formal headdress worn since about 1750 by Protestant women as part of their local costume or Tracht in the three neighbouring Black Forest villages of Gutach, Kirnbach and Hornberg-Reichenbach. With its woollen pompoms, the picturesque-looking red Bollenhut has become a symbol of the Black Forest as a whole, despite its very local origins. The red pom-poms and white brim of the Bollenhut also is said to have inspired the top layer of the Black Forest Cake.