I recently bought some 100% wool pillows:
And love them!
They join my lower set of pillows which are duck feather pillows.
I did originally buy a set of additional duck feather pillows, but despite their premium price tag they smelt awful! So sent them back. Here’s a link in case anyone’s interested - maybe I was just unlucky:
(You should not use duck feather bedding or pillows if they have a noticeable smell of duck)
Anyway, curious what you all have - and remember, you really do not want polyester pillows (which are basically plastic, specifically synthetic fibers derived from petroleum).