Mask

FIG. 1 is a front view a mask;

FIG. 2 is a right side view of the mask shown in FIG. 1 , with the left side view being a mirror image thereof;

FIG. 3 is a top view of the mask shown in FIG. 1 ;

FIG. 4 is rear view of the mask shown in FIG. 1 ;

FIG. 5 is an isometric view of the mask shown in FIG. 1 ; and,

FIG. 6 is a bottom view of the mask shown in FIG. 1 .

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