Husky and broad-shouldered as they are, cowboys occasionally get chilly while working the herd outdoors or casually saving a damsel in distress on his way to pick up a swankier cowboy hat in town.
On those days when they need a little extra sass or simply a lightweight cover up, they wear scarves. Sort of. Watch this video to learn how to tie a four corners know, also known as a cowboy knot, for a cover up that won't knock off macho points.
Very useful if you want to steal cows from your neighbor.
Or if you want to rob the train.