the.com/silk stocking

means A wealthy, socially elite person — originally one rich enough to wear expensive silk hosiery when most people made do with wool or cotton.

from Silk stockings were a genuine luxury good for centuries, expensive and delicate enough that wearing them signaled you didn't labor for a living. By the late 1700s, 'silk stocking' was already political slang in America — 'silk-stocking' gentry versus the common folk — and the phrase stuck around to describe posh neighborhoods and wealthy districts (New York's 'Silk Stocking District' among them). The clothing item simply became shorthand for the class that could afford it.