Nasal mask

FIG. 1 is a top, front and side perspective view of a nasal mask embodying our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

In the drawings, the equal-length broken lines depict portions of the nasal mask that form no part of the claimed design. The breathing tube of the nasal mask is shown with a symbolic break in its length, defined by two breakaway lines. The appearance of any portions of the breathing tube between the breakaway lines forms no part of the claim. The breakaway lines also form no part of the claim.