We claim the ornamental design for a bulletproof bandana, as shown and described.
FIG. 1 is a front view of a bulletproof bandana showing our new design in use;
FIG. 2 is a rear view thereof in use;
FIG. 3 is a rear view thereof in a flat configuration;
FIG. 4 is a front view thereof in a flat configuration;
FIG. 5 is a left side view thereof in a flat configuration;
FIG. 6 is a right side view thereof in a flat configuration;
FIG. 7 is a top view thereof in a flat configuration; and,
FIG. 8 is a bottom view thereof in a flat configuration.
The human figure defined by broken lines assists in illustrating how the claimed design may appear when in use and forms no part of the claimed design. The two parallel dashed lines that follow the perimeter of the bulletproof bandana depict claimed stitching.