I bought two pairs of silk from Cabelas for my moose hunt a few years ago and it worked fine. I have a UA top & I also have the Bass Pro version of the Under Armor (compression fit) and it also works, (at half the price of UA). But as far as the wicking effect, I think the silk wicks better IMO. When you put on the silk you immediately feel cold as moisture is being pulled from your body. I do get this from the others, but not even close to that of the silk. The cons of silk? they won't last as long (wear thin), can get runs if you get snagged on something sharp in camp (like lady's hose), have to be washed carefully. I also found that with either of these choices, wearing them directly against the skin (no undies) is a must for good wicking where you need it the most. That being said, I tend to wear the Bass Pro stuff more unless i'm doing a lot of walking. It keeps me warmer. I guess you'll just have to treat yourself to both!