FIG. 1 is a front perspective view of a backpack;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a left side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a front perspective view of a backpack in an open configuration to reveal an interior of the backpack;
FIG. 10 is a front elevational view thereof;
FIG. 11 is a right side elevational view thereof;
FIG. 12 is a rear elevational view thereof;
FIG. 13 is a left side elevational view thereof;
FIG. 14 is a top plan view thereof; and,
FIG. 15 is a bottom plan view thereof.
The broken line showing of straps and dividers is included for the purpose of illustrating environmental structure and forms no part of the claimed design.