Answer:
Madame Ratignolle is wearing a white muslin dress and a broad, plaited sun-hat when she and Edna go together to the beach in Chapter 7 of The Awakening.
This attire suggests that Madame Ratignolle is a conventional, respectable woman who adheres to the social norms of her time and class. The white muslin dress is a traditional, feminine garment that would have been considered appropriate for a woman of Madame Ratignolle's status to wear in public. The broad sun-hat is a practical accessory that would have protected her skin from the sun's rays, but also serves as a symbol of her social status, indicating that she is a lady of leisure who has the time and means to enjoy the beach.
In contrast, Edna is wearing a simple, unadorned bathing suit that reveals more of her body than would have been considered appropriate for a woman of her social standing. Edna's attire suggests that she is a more independent and unconventional woman who is willing to challenge the social norms of her time and assert her own desires and preferences.