Breathing Mask

FIG. 1 is a perspective view of a breathing mask, illustrating our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is a bottom perspective view thereof.

The broken lines in the drawings depict the bounds of the claimed design and form no part thereof. The area inside the broken line boundary forms no part of the claimed design.