US D583255 S1
The ornamental design for a flexible pouch, as shown and described.
FIG. 1 is a perspective view of a flexible pouch;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof; the left side elevational being a mirror image thereof;
FIG. 4 is a top plan view thereof; and,
FIG. 5 is a bottom plan view thereof.
The broken lines shown in the drawing are for illustrative purposes only and form no part of the claimed design.