I ordered these slacks in the Blue Merino Wool fabric. That's a wool/polyester blend. My intention was to have slacks that were easy to care for, washable and wrinkle resistant. It worked like a charm. I have wrinkle resistant slacks which I have washed without any noticeable shrinkage.
Fit:
The fit of my new slacks was excellent. I will shorten the length next time, but I now have pants tailored to my exact size and preferences. I love these pants.
Washability:
Thus far, I have only washed in cold water and Woolite. I will probably continue that, but I suppose that I could use regular detergent as long as the water was cold. I do not dry these slacks in the dryer, but instead hang them to dry. I will continue that as well. There has been zero shrinkage. They fit exactly the same way they did when first delivered.
Wrinkle Resistance:
The slacks are wearable without ironing. If I decide I want a very sharp crease, I will iron the slacks and they look absolutely terrific.
Bottom Line:
I love wool/poly blends for men's slacks.