In the 1770’s, (when huge wigs and hairstyles were fashionable) the ‘calash’ bonnet was worn to protect the high hairstyles from the weather. These collapsible bonnets were made of strips of wood or whalebone sewn into channels of a silk hood. A long ribbon attached to the top front of the hood, held firmly in the hand, allowed the wearer to hold the calash securely, while walking in the wind.
Alexander Chee’s The Queen of the Night Is an Epic Novel for the Fashion-Obsessed
The Princess Elizabeth, at about age fourteen. I have always preferred the fashions of this earlier Tudor Era. Note the jewelry she wears, and do follow the link to read more on the jewelry worn by the Tudor upper classes.