Webster’s Revised Unabridged Dictionary · 1913
Duffel
Duf′fel (dŭf′fĕl), n. [D. duffel, from Duffel, a town not far from Antwerp.] A kind of coarse woolen cloth, having a thick nap or frieze. [Written also duffle.]
Good duffel gray and flannel fine. Wordsworth.