Duffel bag

FIG. 1 is a front, right perspective view of a duffel bag showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines illustrating the zipper form part of the claimed design. The remaining broken lines illustrate portions of the duffel bag and form no part of the claimed design.