An old hunter like me knows how he survived in cold weather. A younger hunter might only know the ads on the internet. Or the best and the greatest and something that costs more money.
An older hunter might have already seen hunting in below zero weather. I have a couple of 40 plus year old wool sweaters, that still fit. I wore them forty years ago; I can wear them now under a parka.
I'm scouting out some military gear. Military knows something about survival in cold weather.