You bunch up the matte black poncho, and fit your head into its hood, before relaxing your grip, letting its fabric drape down over your body, adjusting its fit with a slight tug here and there.
[Please enter an optional alias for you to be referred to. One line of input, @abort to abort.]
Okay, you are now targetable by your shortdesc keywords (a shrouded squat mano) or the alias 'Catmother'.
If your disguise breaks/is removed, you don't have the alias anymore and you're targetable as normal.