My synthetics get used all day, in cold temps with a lot of perspiration. When back to my tent at the end of a hard day, I'll typically put on a down or synthetic jacket (depending) to warm up. It's amazing how fast the capilene will dry out vs. wool. I despise getting into a down bag with wet clothes, and with nylon I'm dry and good to go. Not so with wool. Ditto pants and long undewear bottoms too...
