US D458993 S1
FIG. 1 is a front perspective view of a nasal mask showing our new design;
FIG. 2 is another perspective view thereof, taken from the rear;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a right side elevational view thereof, the left side elevational view being a similar thereto;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The portions drawn in broken lines are shown for illustrative purposes only and do not form part of the claimed design.