Mushroom Hat refers to the women's Hat with mushroom-like, large downward curving brim, with a shallow crown like the one worn by Audrey Hepburn in "Breakfast at Tiffany"s”. The shap e resembles a mushroom, hence it is named Mushroom Hat.
Mushroom Hat is also called Lampshade Hat.
Mushroom Hat is known as a Tiffany in Italy, from the hat worn by Audrey Hepburn in the film "Breakfast at Tiffany's".
Audrey Hepburn, as Holly Golightly in Breakfast at Tiffanys, emerge from her bathroom in her black cocktail dress and wide brimmed black Mushroom Hat with the simple white gauze wrapped around it.