Gonna chime in here because I wore under armor for the first time today-got a long sleeve shirt for christmas.
Now, I also ski so I like polypropylene alot but then again I was happy w/ the cotton long johns i wore as a kid.
Any way, as soon as I put this shirt on, inside by the fire, I felt cold-instantly. Figured, well it's high tech, see what happens outside as I cleanup after our N'oreaster last night. After 45 min on the tractor I was way too cold, couldn't take it anymore came in and changed to polypro-felt warm as usual.
So-my question to your query: what is the deal w/ UA? based on today, I wouldn't spend my money on it.