Balaclava

(1) Detach hair
(2) Add Balaclava (there's no Alpha)
(3) Edit-Stretch to get size approximately right
(4) Edit-Move to get correct height, so that eyes and mouth look right
(5) Edit-Stretch "depth" to get front-to-back right
(6) Edit-Stretch "width" to get the ears covered --- and you should be done.
(-) I didn't attempt to change darkness or colors.

creator works with you if any problems occur

Let the content speak for itself

For some reason the black texture for the mask isn't coming in.

Also the mask is a bit too large.

It is well modeled however.