ORIGINAL: TKHUNTER
I am not sure I understand about Under Armour. It is so thin, it doesn't seem it would keep you warm.
Does it wick the moisture away from your skin?
If this is so, then you also have to wear other insulated underwear, right?
That's what works for me. I have the Cold Gear then I start layering up. Not sure if it's what everyone else does but I didn't get cold when starting with Under Armour.