I use wool ALL the time!! I log in it, plow in it, hunt in it etc. I figure wool is basically hair, so I wash mine in the wash machine on the delicate cycle with shampoo. Hey I even wash wool blankets in it the same way to tighten the weave from many seasons of sleeping on the ground in the timber. When they are washed and all the cycles are done, I lay out the clothes on a drying rack or on the floor over a towel or two and let them dry. The wool softens up, but does not shrink or lose aby durability. It works wonderful. However, if not on the delicate cylce, you will likely have a problem.
Good luck,
Bob.