What is the identifying feature of Leeta's appearance in the novel, Dietland?

When Plum tells the reader she is being followed by a mysterious young woman, she mentions the young woman's brightly-colored tights, saying that her legs are always covered in some bright color that would come in a pack of Lifesavers. As Plum continues to notice the woman following her, she always mentions the brightly-colored tights as Leeta's identifying feature.