The duffel coat looked incongruous with the black dress she wore underneath.
The word " traditional" implies that something has stood the test of time on its own merits and should be preserved -- red pillar boxes, duffel coats, marmalade, the August Bank Holiday, the pint, privet hedges, Wellington boots.
duffel coat, women's or girls', of textile materials, not knitted or crocheted
duffel coat, men's or boys', of wool or fine animal hair, not knitted or crocheted