When Gatsby shows Daisy and Nick around his home, he takes her into his bedroom to open the closet doors and reveal the expensive clothing that he has. Gatsby tells them that he has a man in England who buys his clothes, and he begins tossing shirts towards them. They were
shirts of sheer linen and thick silk and fine flannel.
In other words, the shirts are expensive and meant to show Daisy how easily Gatsby can spend what was probably a small fortune on purchasing clothes that have been hand-selected for him by his “man in England.” While Gatsby is heaping the pile of shirts at them,
Suddenly with a strained sound, Daisy bent her head into the shirts and began to cry stormily.
Her emotions probably reflect several things that she is feeling simultaneously. First, the fact that Gatsby can afford the grand house and lavish parties and expensive wardrobe make her realize that she could have married Gatsby instead of Tom after all and had everything that Gatsby could offer her. Second, she also probably feels the intensity of Gatsby’s love or desire for her while, by comparison, Tom seems to have tired of Daisy and is having an affair with Myrtle.
However, Daisy did not wait for Gatsby. She chose Tom over Gatsby likely for several reasons, one being the stability a quicker marriage to Tom would allow her. But among these reasons is that she wanted the life and material things that Tom could give her. Tom offered her the luxurious upper-class life she was used to and looked forward to:
The day before the wedding he gave her a string of pearls valued at three hundred and fifty thousand dollars.
Much earlier than this, when Gatsby recalls the period when he and Daisy first met during his time as a soldier stationed near her parents’ home, he discloses that he misled Daisy into believing “that he was a person from much the same strata as herself—that he was fully able to take care of her.” Had she known differently, Daisy likely would have viewed Gatsby differently, which again reveals her materialism and the importance she places on riches and social status. After she left Gatsby one night to return to her parents’ home, Nick says,
She vanished into her rich house, into her rich, full life, leaving Gatsby—nothing.
The word rich is repeated twice to show the importance of the material richness both to Gatsby and to Daisy. Daisy needs the materialistic conveniences of a rich life to make her life happy, and that, coupled with her urgency to be married and settle down, led to her marriage to Tom.