Who remembers when insulated underwear was insulated underwear and base layering didn't exist.

I just tested out some from two or three generations ago, insulated wear, that are still available, at a lower price.

Us old guys still see the twenties coming from the wallet instead of the credit cards. Of course when you survived zero and below weather in white cotton insulated underwear, basewear has a different meaning. Newbies know something different. And there is no changing that.