The ornamental design for a shoe upper, as shown and described.
FIG. 1 is a side elevational view of a shoe upper according to the present invention, within a first environment of use.
FIG. 2 is a perspective view thereof.
FIG. 3 is a side elevational view of the shoe upper, within a second environment of use.
FIG. 4 is a perspective view thereof.
FIG. 5 is a side elevational view of the shoe upper, within a third environment of use; and,
FIG. 6 is a perspective view thereof.
The portions shown in broken lines are solely for the purpose of illustrating context, environment or other unclaimed areas and form no part of the claimed design.