The beauty of this very fine merino is that it can be worn clinging to the skin and worn underneath the other thermals.
Because it is wool, it has a greater warming factor than most fabrics, and will significantly increase the warmth effect.
For Ray living in a warmer climate, the merino can be warn under lighter weight cloths, and doesn't look like it is thermals, as it is skin hugging and extremely fine. Basically, you don't need to change your wardrobe every time a cold front comes in.
I see you have had a terrible time in the US with the extreme cold.