What is trousers or overalls of thick cloth or leather, buttoned on the outside of each leg, and generally worn to protect other trousers when riding on horseback. [Local, U.S.] Bartlett called?

sherryvallies — Trousers or overalls of thick cloth or leather, buttoned on the outside of each leg, and generally worn to protect other trousers when riding on horseback. [Local, U.S.] Bartlett. (Webster's 1913.)