Cushion for respiratory mask

FIG. 1 is a front perspective view of a cushion for a respiratory mask according to a first embodiment of our new ornamental design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right side view thereof, with the left side view thereof being a mirror image thereof;

FIG. 7 is a reverse perspective view thereof;

FIG. 8 is a cross-sectional view along line 8 - 8 of FIG. 2 ; and,

FIG. 9 is a cross sectional view along line 9 - 9 of FIG. 2 .