sb,
I haven't used the UA stuff but the Redhead (BPS) brand that is pretty much just like the heat gear works great. I hunt in the SC lowstate where bow comes in on Aug. 15 along with 95 degree weather and mosquitoes the size of birds. I put a pair of their shorts and tee-shirt under my Shannon's bug tamer and I am good to go. It has silver ions in it to kill scent also. Last year I hunted with it for a 2 day hunt and took it off to dry in between hunts and there was no smell. Hope this helps...