What’s the most breathable t-shirt you found here?

First, I believe that those "tech" shirts are more breathable than plain cotton, but I am opened to try anything.
Last years' uniqlo dry-ex sports shirt (with the color gradation) was the best I ever found, but it's discontinued. Other "mesh" shirts, uniqlo or others, are too thick, they don't work as well.

Feedback on any brands would be welcome.