She was the niece of Mme Pompey and succeeded her in the privilege of selling the trimmings and accessories to the women of the royal court.
She provided dresses for the ladies-in-waiting in the court of Versailles, and Marie Antoinette was a regular costumer.
After the outbreak of the French Revolution, Eloffe no longer sent her bills monthly to her clients, but charged them directly for each item.
Madame Eloffe was one of the four top fashion merchants alongside Rose Bertin, Le Sieur Beaulard and Mademoiselle Alexandre during the reign of Louis XVI.
Her account books, unlike those of Rose Bertin, have been preserved and are considered to be valuable historical sources, particularly in regard to the wardrobe of Marie Antoinette.