Slugman,
You got a web site on that gear. I've used UA for years. It will heat you up quickly. It's like wearing a damp T-shirt in a breeze. You will get chilled if that is all you are wearing. I don't like to dress bulky when hunting so I play the weather forcast. I have used it in all climates and I like the compression. Helps prevent muscle and joint fatigue by keeping you warm. I use UA T's when I'm in uniform. I wouldn't use it on medium to warm days because of the wicking. Brings your scent to the surface. Does not trap odor and retains stink even after wash.