FIG. 1 is a perspective view of a sleeve showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a front elevational view thereof, shown in an environmental use wherein an electronic device being placed into the sleeve;

FIG. 9 is a front elevational view thereof, showing an electronic device inserted therein;

FIG. 10 is a front elevational view of the sleeve having a green color designation;

FIG. 11 is a front elevational view of the sleeve having a blue color designation;

FIG. 12 is a front elevational view of the sleeve having a red or pink color designation;

FIG. 13 is a front elevational view of the sleeve having an orange color designation;

FIG. 14 is a front elevational view of the sleeve having a purple color designation;

FIG. 15 is a front elevational view of the sleeve having a yellow color designation;

FIG. 16 is a front elevational view of the sleeve having a black color designation;

FIG. 17 is a front elevational view of the sleeve having a white color designation;

FIG. 18 is a front elevational view of the sleeve having a gray or silver color designation; and,

FIG. 19 is a front elevational view of the sleeve having a transparent or semitransparent designation.

The broken lines are for illustrative purpose only and form no part of the claimed design.