Backpack

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

FIG. 2 is another perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a back view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a bottom plan view thereof;

FIG. 9 is a partial enlarged view of portion 9 in FIG. 1 ;

FIG. 10 is a partial enlarged view of portion 10 in FIG. 1 ;

FIG. 11 is a partial enlarged view of portion 11 in FIG. 2 ; and,

FIG. 12 is a perspective view thereof shown in an environment.

The broken lines depict portions of the backpack and form no part of the claimed design.

The dash-dot-dash line is included for the purpose of illustrating the bounds of the enlarged view and forms no part of the claimed design.