FIG. 1 is a front view of a nasal mask showing the new design;

FIG. 2 is a back view of the design shown in FIG. 1;

FIG. 3 is a side view of the design shown in FIG. 1, each side being a mirror image of the other;

FIG. 4 is a bottom view of the design shown in FIG. 1; and,

FIG. 5 is a top view of the design shown in FIG. 1.

The portions of the Figures shown in phantom lines are not part of the claimed design but are for illustration only.