The ornamental design for a tote bag, as shown and described.
FIG. 1 is a front perspective view of a tote bag of the present invention.
FIG. 2 is a front elevational view of the present invention.
FIG. 3 is a back elevational view of the present invention.
FIG. 4 is an elevational right side view of the present invention.
FIG. 5 is a elevational left side view of the present invention.
FIG. 6 is a top view of the present invention; and,
FIG. 7 is a perspective bottom view of the present invention.
The dot-dot dashed lines showing on the drawings is for illustrative purposes only and forms no part of the claimed design; the consecutive dashed lines represent stitching.