FWIW.....I'm a mountain hiker and burn calories like dry tinder burns. Been there with the Filson stuff and I like it but for me it's a bit heavy. I've never been cold with high tech Patagonia thick gear and a wind breaker that's water proof. Same for pants. Still I like the double Mackinaw for non strenuous camp/around town travelling. Something about using the old time gear is fun but I'll go with the lightest/warmest clothing any day over wool.
Will say that I have a thick tightly knitted sweater that's pricey as all get out made from Alpaca that's soft, warm, and like better than cashmere. Wonderful stuff.
