Hair Extension

FIG. 1 is a top, right perspective view of a hair extension of my new design shown in a flat configuration; FIG. 2 is a top plan view thereof; FIG. 3 is a first side elevation view thereof; FIG. 4 is a bottom plan view thereof; FIG. 5 is a second side elevation view thereof; FIG. 6 is a first end view thereof; FIG. 7 is a second end view thereof; FIG. 8 is a top, right perspective view of the hair extension of FIG. 1 in a folded configuration; FIG. 9 is a top plan view thereof; FIG. 10 is a first side elevation view thereof; FIG. 11 is a bottom plan view thereof; FIG. 12 is a second side elevation view thereof; FIG. 13 is a first end view thereof; and, FIG. 14 is a second end view thereof. The hair extension is shown with a symbolic break in the length. The appearance of any portion of the article between the break lines forms no part of the claimed design.