Face mask cushion

FIG. 1 is a top, front, and left side perspective view of a face mask cushion;

FIG. 2 is a top, rear, and left side perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view thereof.

The dashed broken lines in the figures are used to illustrate portions of the face mask cushion that form no part of the claimed design.