wool definitely will not get the same funk as normal synthetics. Some synthetics are treated with an antimicrobial and do better than others, I know several t shirts that get a funky smell quicker than others. Addidas makes some clothing impregnated with silver threads which are a natural anti bacterial agent, as well as some clothing by Campagnolo. My best suggestion is to use a vinegar water solution. Learned this one from trying to keep the smell out of neoprene and other kayaking gear. Put about a cup per gallon in a pail or the sink and let the clothing soak, then wash normally. The acidic solution will kill the bacteria and remove the stink, and when you wear it again you might get just the slightest smell of vinegar. You won't have to do this every time you launder, but often enough when you notice the funky smell isn't leaving by washing along. You can also just soak in the solution, then rinse in clear water and let the clothing air dry.