I started hunting when baselayer wasn't even a word. Back then it was cotton insulated underwear. Baselayer!!!

I have to wear some of this stuff this winter for long ago testing. Keep some; reject others.

I have some "insulated" wear of ten years ago, poly from some 20 years ago, one cotton pair of cotton insulated underwear, time period unknown, and two Shetland wool sweaters bought over forty years ago.

The miracle is not being able to do the tests this winter, having survived -10 hunting weather when young. it's the fact everything still fits. Even the 40 year old sweaters. I think they'll stay in the baselayer.