you probably have received frozen food packaged in wool packaging - my KatKin deliveries use it but other food/frozen deliveries use it.
I was scratching my head as to how to reuse the wool packaging & not just bin it and one day I decided to use the wool as lining for the cats litter tray.
Its incredible - the litter tray no longer smells. at all.
Wool is a fantastic deoderiser so it makes sense - sharing in case anyone else fancies trying it!