From Wikimedia.
Countess Sofia wears a vest over a white bodice as well as lush over-growth of hair in this Voille portrait from around 1791.
Keywords: 1791, Voille, Sofia Vladimirovna Panina, Orlov family, Panin family, Countess, Russian, Lady-in-Waiting, Catherine II, bouffant coiffure, scoop neckline, lace bertha, vest, quarter length close over-sleeves, cuffs, bodice, close under-sleeves, order sash, order bows