We claim the ornamental design for a bag, as shown and described.
FIG. 1 is a perspective view of a bag embodiment showing our new design in a first state (with two-piece strap fastened; zippered closed);
FIG. 2 is a side elevation view of the bag of FIG. 1, in a second state, zippered closed, with the two-piece strap unfastened, the opposite side elevation view being identical;
FIG. 3 is a top elevation view of the bag of FIG. 1, in a third state, unzippered, and lying flat, the two-piece strap unfastened, with a pair of flaps positioned adjacent the corresponding unfastened two-piece strap;
FIG. 4 is a top elevation view of the bag of FIG. 3, in a fourth state, unzippered, and lying flat, the pair of flaps folded and concealing the corresponding unfastened two-piece strap; and,
FIG. 5 is a back side elevation view of the bag of FIG. 4.
In FIGS. 1 and 2, the pair of flaps are tucked in and obscured from view.