Backpack

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

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof;

FIG. 8 is a rear perspective view thereof; and,

FIG. 9 is an enlarged detail view of area 9 in FIG. 2 .

The dash-dash broken lines in the drawings illustrate portions of the backpack which form no part of the claimed design. The dash-dot-dash broken lines on FIG. 2 represent the enlargement indications taken from FIG. 2 and forms no part of the claimed design.