When I read all these articles about wool, it makes me feel as though I am the only bowhunter who has ever hunted amongst thorns and briers during a steady, cold rain. As a base layer or middle layer of clothes, worn UNDER a true rain-proof outer garment I can appreciate wool's insulating value. On cold, wet mornings in a duck blind or in a tree stand, nothing feels as good against my neck as my Filson woolens. But truth be told, the surest way to commit myself to about 1-2 hours of brier/thorn removal duty after a hunt would be to wear my wool as an outer layer- it's just not practical in my neck of the woods.
IMH experience as a veteran waterfowler (hence, "Labs4me"), the other issues with wool is that it is bulky, slow to dry, and heavy when wet. To go out hunting in a steady, protracted rain wearing a wool shirt or sweater coverred by a wool coat is great if hunting in wet clothes later that afternoon or the next morning is your bag. As a bowhunter/waterfowler who apprecieates the challange of staying comfortable while hunting during miserably cold, wet conditions, IMHO wool is MOST effective when worn under a waterproof, windproof, silent outer garment.
Labs