FIG. 1 is a front perspective view of a hairbrush;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a left side elevation view thereof;
FIG. 5 is a right side elevation view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom plan view thereof;
FIG. 8 is an enlarged view of the head of the hairbrush shown in FIG. 1;
FIG. 9 is an enlarged view of the head of the hairbrush shown in FIG. 2;
FIG. 10 is an enlarged view of the head of the hairbrush shown in FIG. 3;
FIG. 11 is an enlarged view of the head of the hairbrush shown in FIG. 4;
FIG. 12 is an enlarged view of the head of the hairbrush shown in FIG. 5;
FIG. 13 is an enlarged view of the hairbrush shown in FIG. 6; and,
FIG. 14 is an enlarged view of the hairbrush shown in FIG. 7.
The broken lines illustrate portions of the hairbrush that form no part of the claimed design.