i wear cotton all the time. i wear a t under my jacket because my jacket is warm so i stay dry/uncold. light/medium insulated Section Division Jacket. Had to wear a hoodie also mostly cotton 3x only when it was -30. i wear cotton socks. my socks get wet, so i tried wool and same deal. so its a w/e situation there.
some days i just wear a cotton hoodie or t when its warm.