US D437997 S1
FIG. 1 is a front view of the backpack with open flaps, with all buckles, straps and zipper assembly shown in phantom;
FIG. 2 is a back view thereof;
FIG. 3 is a right side view thereof, the left side view thereof being a mirror image of the right side view;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The dashed lines on the backpack are understood to represent stitching.
The buckles, straps, and zipper assembly shown in phantom are for illustrative purposes only and form no part of the claimed design.