Backpack

FIG. 1 is a front perspective view of a backpack, showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is an exploded perspective view of a backpack shown in a state of use.

The broken lines in the drawings illustrate the portions of the backpack, which form no part of the claimed design. The broken lines depicting the strap in FIG. 9 are for the purpose of environment and form no part of the claimed design.