Crossbuck is a type of pack saddle that is usually rigged for a double cinch and is best suited for carrying hanging panniers. The crossbuck is the saddle that most people think of as a packsaddle and the type you see in pictures of prospectors and mountain men. The bars (the sculpted horizontal pieces that lie against the animal’s back) are joined by a pair of hardwood crosspieces front and back that form an X. This looks like a sawbuck used for cutting firewood, and has resulted in another name for the crossbuck saddle, the sawbuck.
Originated from the American Youth Horse Council's
Horse Industry Handbook
The umbrella organization providing leadership and resources for the youth horse industry.