ORIGINAL: jw324sc
I have never used anything but regular cotton thermals. Is there a big difference between the UA stuff and the much cheaper Poly Prothermals. I hate to spend $110 for a UA set when the Poly Pros are only $25.
I'd advise to stay away from cotton thermals. They are OK for around the house and bedwear, but thats about it.
TO tell you the truth, I have used both now (just recently on the under armour). And I like how the underarmor will keep you completely dry against your skin. Polypro is is warmer then the underarmor however, you can develope little "pockets" of sweat where it is not against your skin.