Bonnet Rouge, soft woolen peasants cap worn in ancient time and revived during the French Revolution to recall the Plebeian working class and fits with the popularity of neoclassicism during the 18th Century.
In the French Revolution, the sans-culottes were the radical partisans of the lower classes; typically urban laborers. The appellation refers to the fashionable culottes (silk knee-breeches) of the moderate bourgeois revolutionaries, as distinguished from the working class sans-culottes, who traditionally wore pantaloons (pants). During the peak of their influence, roughly 1792 to 1795, the sans-culottes provided the principal support behind the two far-left
French Revolution Rebel: It's 1789 and Paris has had it with this royal tyranny! You'll need a some worn trousers (you are a sans-culottes, after all), a peasant shirt, a red Phrygian cap with a tricolor cockade, a red scarf around your neck or waist and a sword or musket. Liberté, égalité, fraternité!
Sans-Culottes - Group of working-class men who supported the French Revolution. One of their most noticeable characteristics at the time was that they wore pantaloons -- "sans culottes" meaning "without knew breeches".