DOUBLEBREASTED
Double-breasted
In clothing, the term double-breasted refers to a coat or jacket with wide, overlapping front flaps and two parallel columns of buttons or snaps; by contrast, a single-breasted coat has a narrow overlap and only one column of buttons. In most modern double-breasted coats, one column of buttons is decorative, while the other functional. The other buttons, placed on the outside edge of the coat breast, allow the overlap to fasten reversibly, right lapel over left lapel. To strengthen the fastening, a functional inner-button, called the jigger, is usually added to parallel-fasten the over-lapped layers together from the inside.The above text is a snippet from Wikipedia: Double-breasted
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