A short coat made of mackinaw cloth, a dense water-repellent wool. These jackets were popular with lumberjacks and outdoor enthusiasts throughout the colder regions of north america for much of the 18th and 19th centuries. They had at minimum two breast pockets, though four front pockets are common. Mackinaw jackets can be of any color, but the black and red plaid "lumberjack" pattern was most common.
Origin of mackinaw-jacket