When I'm on the move (always) I run hot and sweat, regardless of the number of layers. That's why I wear lightweight base merino tops and bottoms, to wick that sweat away from my skin.
That what I use. I prefer merino because I don’t get chilled after I sweat a lot. The few synthetics I’ve tried after sweating in cold weather wound up coming off due to that chill factor. Merino is warm for me whether it’s sweat soaked or dry.