Hair Straightener

FIG. 1 is a bottom, right side perspective view of a hair straightener showing my new design;

FIG. 2 is a top, left side perspective view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a front view thereof.

The broken lines illustrate portions of the hair straightener that form no part of the claimed design.