I claim the ornamental design for a tote bag, as shown and described.
FIG. 1 is a perspective view of a tote bag in a compact orientation according to the present invention;
FIG. 2 is a perspective view of the tote bag in a partially open orientation;
FIG. 3 is a perspective view of the tote bag in an open orientation;
FIG. 4 is a front side view thereof;
FIG. 5 is a back side view thereof;
FIG. 6 is a right side view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a top view thereof; and,
FIG. 9 is a bottom view thereof.
The broken lines are included for the purpose of illustrating portions of the tote bag and form no part of the claimed design. All broken lines that represent stitching or zippers or environmental structure or boundaries form no part of the claimed design.