Many wools are washable.
The main things to remember:
1) Avoid hot water
2) Avoid prolonged agitation
One can wash SOME of them on a short gentle cycle on warm or cold.
One can also damp dry them in a dryer. Some people are more comfortable line drying the fabrics or laying them flat to dry.
I have some used garments that I'm thinking about cutting up.
I think I will wash them like I wrote above - and see how they turn out.
If they turn out well - Yippee! If not, I didn't want to use them anyway.
If you do decide to wash these - do colors separately until the water runs clear.