Mask

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

FIG. 2 is a rear view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a perspective view thereof.

The broken lines depict portions of the mask that form no part of the claimed design.

The use of the symbol on the design article forming no part of the claimed design is a trademark under examination of DCSTAR INC.