Jacobin's called themselves 'sans culottes' to distinguish themselves from the aristocracy who wore the fashionable knee - breeches.

(A)they started wearing loose and comfortable clothes and thus french revolution revolution ended these distinctions.the simplicity of clothing was meant to express the idea of equality.
(B)political symbols like the colours of france - red,blue and white became popular as they were a sign of patriotism with the intervention of jacobin's.
(C)other symbols like the revolutionary cocked pinned to the hat , red cape of liberty and long trousers also became popular and was widely worn by the people.