The ornamental design for bag, as shown and described.
The file of this patent contains at least one drawing/photograph executed in color. Copies of this patent with color drawing(s)/photograph(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a front view of a bag showing my new design, a rear view being identical to the front view;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a right side view thereof, a left side view being identical to the right side view; and,
FIG. 5 is a reference view of a usage state.
The broken lines showing the eye mask, are for illustration purposes and form no part of claimed design.