It's hard bro, especially for feet...i think all my sweat glands are in my feet. I have a terrible time it's it's the least bit cool out. Even 50°f and my feet are cold and clammy. I've tried every darned sock and still have trouble. My best solution is to change socks at the first sign of wetness.
Right now my favorites are alpaca socks. Then Merino.
I have like a couple remaining pairs of some super thin low cut sock that is not cotton but still seems to breathe, otherwise short cotton socks & minimalist shoes seem to work pretty well for me. There are just so many synthetics now & I have to make a point to avoid most of them. 40-60% polyester & cotton blends CAN be okay for shirts, but it kinda seems to differ from one company to another.
