White Trench Coat Men Does Anyone Know What Type Of Coat That The Men Wore In The Old Westerns?

Does anyone know what type of coat that the men wore in the old westerns? - white trench coat men

It was like a feather duster, but had 2 or 3 parts and was like a raincoat, with a lot in an old black and white film, a Scrooge had in the movie "The Christmas Story. Please help my husband really wants badly, and where can I get one.