I wash my wool cloths in cold water in the machine. When done, do not, do not put them in the dryer. Hang them in a shaded area or from the shower curtain rack. I have done this for 50 years of hunting.I was into Civil war reanacting when i was young. The uniforms were all wool.This is how we and the original soldiers washed there uniforms, They did by hand in streams or tubs in a main camp. they didn't wash much tough. Just keep away from heat. That's why i like wool, it gets wet, but still keeps you warm. Oh yeah, use a wool safe soap, and don't wash to often. I also get my wool coats dry cleaned, to big to wash. The wool in shirts and pants are a weave and is stronger than a nitted sweather , they shrink.