Ironically, it was most likely imported English “Kerseymere” or Broadcloth the American Revolutionary patriot officers were wearing to fight the English.
(photos: Battle of Bunker Hill, Massachusetts, during the American Revolution 1775, where the “Red Coats” fought the Patriot “blue coats”.. mostly made of the same fabric)
(1 American side; 2 Americans on “Breeds Hill”; 3 “Death of General Warren”)