The ornamental design for a headband and scarfcombination, as shown and described.
FIG. 1 is a left side view of the headband and scarf combination;
FIG. 2 is a rear side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a left side view of the headband and scarf combination, but with the scarf worn outside the headband;
FIG. 6 is a rear side view thereof;
FIG. 7 is a right side view thereof;
FIG. 8 is a front view thereof;
FIG. 9 is a top plan view of the headband and scarf combination, laid flat; and,
FIG. 10 is a bottom plan view thereof.
The broken lines showing a person's head and neck in the drawings illustrate environmental matter and form no part of the claimed design. The four broken lines with a tighter interval and shorter segments that are shown across the top and bottom edges of the headband are stitching and are part of the claimed design.