Originally Posted By: Quietly_Learning
I like the omni heat material in some of the Columbia hats.


http://bring-the-kids.com/does-columbia%E2%80%99s-omniheat-technology-really-work/

Quote:
The base layers are made out of a thin polyester, almost spandex like material. The funny thing is that as soon as I put them on, rather than getting warmth, I feel cold. When I get a base layer, I think of insulation, or if I put it on, I expect that I will feel warmer

The bolded text= that is what I think the writer get it wrong. Baselayer is supposed to be the sweat wicking layer, not warming layer. A warming insulating layer goes on top of baselayer.