The ornamental design for a crownstrap of a headgear assembly for a breathinginterface, as shown and described.
FIG. 1 is a first perspective view showing a rear, right side of a crown strap of a headgear assembly for a breathing interface showing the new design.
FIG. 2 is a top view of the crown strap of a headgear assembly for a breathing interface of FIG. 1.
FIG. 3 is a rear view of the crown strap of a headgear assembly for a breathing interface of FIG. 1.
FIG. 4 is a left side view of the crown strap of a headgear assembly for a breathing interface of FIG. 1.
FIG. 5 is a top view of the crown strap of a headgear assembly for a breathing interface of FIG. 1.
FIG. 6 is a front view of the crown strap of a headgear assembly for a breathing interface of FIG. 1; and,
FIG. 7 is a bottom view of the crown strap of a headgear assembly for a breathing interface of FIG. 1.