I probably have 12 pairs of wool hunting trousers.All I use with suspenders.All are various shades of mil green drab..:)
Some are east German ( cold war era) and they are the heaviest with double layers on thigh-front and seat.
I had an old gal down the street replace the buttons with good HD metal fly zippers..:)
Some are Swedish mil from the 60's and some are Swiss mil.

I wash them by hand in warm water & woolite when that's needed, but generally, a light brishing after dirt or mud dries and they are clean enuf for hunting.
Wool CAN be revitalized concerning the natural oils.
Get some lanolin from the pharmacy and mix it well with 1/4 volume white gas into a solution and soak the woolen garments.

Allow to drip dry/blocked on a slightly inclined surface.
GODD competent dry cleaners can do even the finest woolens without harming them but that gets expensive..

I'd like to own nothing but Filson, but never had 500.00 for a suit of any sort that was considered spendable..:)
Milsurp wool is a great bargain..including the better blankets for use as camp blankets..Jim