Cotton dry, but not always though
 

Today’s experiment @ 45°F / 8°C

layer 1: (Thermo) polyester / acryl — layer 2: cotton (for esthetics ;-) — layer 3: wool — layer 4: high visibility jacket

Back sweat went all the way through and hit the mesh inside of the jacket.
Was surprised my cotton shirt didn’t soak.

Sounds like the wool went above and beyond in being awesome at wicking away sweat. ;)

Cotton has been okay for me as long as there's a proper wicking layer next to my skin; and in winter outside the cotton too.

^ Yes. Wicking wool goes next to the skin and everything stays toasty and dryish for me.

I was overdressed on Wednesday and Thursday, and I sweated a lot. I had a wool shirt against my skin and a cotton shirt over it. My cotton shirt got very wet, but my body did not feel wet. Maybe it was, but it was not the bad kind of wet. Wool is excellent. Some synthetics are excellent.

In fact, I didn't even notice I was wet until a friend gave me a hug, and she told me how soaked I was.