A Mob hat or cap was worn by Georgian women of any status.
Its also called a Mop cap which is probably due to a subtle change its use from a frilly bonnet to a hat used by victorian maids who mopped the floor.
This style of hat is mainly associated today with Victorian maids and would normally be white.
Basically, a round cloth gathered with a ribbon or string to give a ruffle brim and covering.
Designed to keep the hair under control, modern plastic and net variants are used in clean environments such as food factories for the same reason.
These caps or a version of them were worn by men at least in the early 18th century but were predominantly women headwear.
