As I said before, if you are cold you are not going to last long on the stand. If you are wet you are not going to last long! If you are wet AND cold, the deer have nothing to worry about! You are NOT going to be out there!
I don't know if it will be Under-Armor or another brand, but I am going to invest in new clothes for next season!
Look at it this way:
Hunting land/lease---------------------------------------XXXX dollars,
Hunting Licence-----------------------------------------XX dollars,
Time, effort, money invested in hunting------------------ XXXXX dollars,
Staying on stand when the deer are liking the weather,
and other hunters are back in camp----------------------PRICELESS!