Adjustable headband

FIG. 1 is a perspective view of a headlamp mounted on an adjustable headband showing my new design;

FIG. 2 is a left side view thereof, with a central portion of the strap member removed for ease of illustration;

FIG. 3 is a perspective view of the adjustable headband;

FIG. 4 is a front view thereof;

FIG. 5 is a partial top view of the rear portion thereof;

FIG. 6 is a partial top view of the front portion thereof;

FIG. 7 is a right side view thereof, with a central portion of the strap member removed for ease of illustration;

FIG. 8 is a left side view thereof, with a central portion of the strap member removed for ease of illustration;

FIG. 9 is a rear view thereof;

FIG. 10 is a partial bottom view of the rear thereof, with the front portion removed;

FIG. 11 is partial bottom view of the front thereof, with the rear portion removed; and,

FIG. 12 is an enlarged partial rear view thereof; to show details not otherwise discernable from the drawings.

The broken lines depict environmental subject matter only and form no part of the claimed design.

The break lines shown in FIGS. 2 , 5 , 6 , 7 , 8 , 10 , 11 and 12 form no part of the claimed design.