The ornamental design for a facemaskstrap, as shown and described.
FIG. 1 is a front perspective view of a face mask strap according to my new
invention and showing the strap attached to a face mask. The face mask is
shown in dotted lines for environmental purposes only;
FIG. 2 is a side elevational view thereof, the opposite side being a mirror
image;
FIG. 3 is a front elevational view of the face mask strap shown in a flat
position;
FIG. 4 is a top plan view thereof, the bottom plan view being a mirror
image; and,