And, Just To Confuse Matters.

I think the most popular image of a; "Horserider" is that of a; "Jockey."

https://twitterwithbraincells.blogspot.com/2023/08/shouldnt-we-master-cavalletti-before-we.html

Jockeys actually wear; "Skullcaps." The collapsible brim they appear to wear is actually a detachable piece of upholstery known as a; "Silk."

Imagine discussing all that with a QC (retd).