I wouldn’t have thought a woollen mask would be very practical.
Masks need to be carefully removed without touching the outer surface and washed at 60 degrees after each use. We have to assume they have been contaminated and as such can’t be worn again without washing.
Disposable masks are only intended for single use and a fresh one required each time.
Trying to reuse a mask without washing would be like going home and not bothering to wash hands.
I saw a disposable mask on someone yesterday which looked very grubby as if it had been worn multiple times.