Don't know about Woolrich, but the Filson jackets/coats are a lightweight version of the old stuff. If I remember correctly, their Mackinaws are in 24 oz. and 26 oz. That's as heavy as they get. By comparison, my old Woolrich is about 30 oz. It is a warm jacket. I can't say the same for my 24 oz. Filson. More fashion wear than cold weather wear.