>>2533691The reason woolpower gets away with 60ish % wool is they are made with an open weave like a sweater your grandma used to make.
You need the insulation to trap heat, which a lot of insulation fails to do. To trap heat you need space.
Its amazing looking at something like polartec (the original fleece company) make something as fragile as polartec alpha direct that thru hikers often use but find it extremely warm do to its ability to trap heat. My stanfield 80/20 is similar in design.
For as much praise as ive given darn tough though they are very dense without a ton of insulation. So they arent efficient. Ive never worn a hole though in their extra cushion.
Hope that clears up woolpowers despite using more nylon and less wool. I wish their base layers were more durable or id choose them over the competition.