I claim the ornamental design for a wearable bag, as shown and described.
FIG. 1 is a perspective view of a wearable bag showing my new design.
FIG. 2 is a front view of the wearable bag showing my new design.
FIG. 3 is a rear view of the wearable bag showing my new design.
FIG. 4 is a left side view of the wearable bag showing my new design.
FIG. 5 is right side view of the wearable bag showing my new design; and,
FIG. 6 is a perspective view of the wearable bag worn on a person showing my new design.
The broken line showing the person in FIG. 6 is for illustrative purposes only and forms no part of the claimed design. The strap is shown broken away in FIGS. 2, 3, 4, 6, and 6 to indicate that no particular length is claimed. The break lines and the associated components therein are for illustrative purposes only and form no part of the claimed design. The dashed lines on the wearable bag represent top stitching.