Duffel (Dutch pronunciation: [ˈdʏfəl]) is a municipality in the Belgian province of Antwerp.The municipality comprises only the town of Duffel proper. On 1 January 2006, Duffel had a total population of 16,019. The total area is 22.71 km² which gives a population density of 705 inhabitants per km².The town gives its name to a heavy woollen cloth used to make overcoats, especially for the armed forces, and various kinds of luggage.