FIG. 1 is a rear perspective view of an earplug in accordance with my new design;

FIG. 2 is a front perspective view thereof;

FIG. 3 is a side elevation view thereof, all other side views displaying the same image thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is a front elevation view thereof;

FIG. 6 is an exploded rear perspective view thereof, showing the earplug shell and the insertion stem of the design;

FIG. 7 is a rear perspective view of only the earplug shell portion of FIG. 6;

FIG. 8 is a rear elevation view of the earplug shell portion of FIG. 6;

FIG. 9 is a side elevation view of only the insertion stem portion of FIG. 6, all other side views of the insertion stem displaying the same image thereof;

FIG. 10 is a front elevation view of the insertion stem portion of FIG. 6;

FIG. 11 is a rear elevation view of the insertion stem portion of FIG. 6; and,

FIG. 12 is a median cross-sectional side view of the earplug shell portion of FIG. 8 taken at the indicated plane and direction.

The broken lines shown in the drawings are only provided to illustrate the environment of the design, and form no part of the claimed design.