FIG. 1 is a perspective view showing the new design for a respirator mask having a circular button;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof, the left side being a mirror image thereof;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines in the drawings illustrate portions of the respirator mask having a circular button which form no part of the claimed design.
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