The quote from Vladimir Nabokov's book "Pnin" uses vivid imagery to create a humorous yet poignant depiction of two elderly women. Their appearance is likened to "potatoes in cellophane," which suggests a certain unattractiveness and fragility, emphasizing their age and the transparent nature of their raincoats. This metaphor paints a clear picture of their physical presence and evokes a sense of nostalgia for the reader.

Moreover, the choice of words highlights Nabokov's unique style, combining colorful descriptions with a touch of irony. The comparison not only illustrates the characters' external features but also hints at deeper themes of aging and the passage of time. In using such a striking visual, Nabokov invites readers to engage with the characters in a playful yet reflective manner, characteristic of his literary approach.