Let’s just say I do it so you don’t have to. I received a nice new ExOfficio t-shirt (on sale now in certain colors) and I just had to test it. After a couple of wearings I was impressed with its comfort but I really wanted to put its odor-fighting properties to the test. After two days of continuous wear as an undershirt (slept in it too) it was almost entirely free of odor. The test may not have been completely fair as I had also washed it in my Stinkfighter formula, but since then I ‘ve worn if for more reasonable periods after normal machine washing and still no odor. This is another impressive ExO product. It’s the most comfortable poly shirt I’ve worn; apparently the 15% cotton brings a lot of comfort bang for the buck, and it still dries pretty quickly if wrung out well. They run quite big, so order down if your a borderline size. Since the shirt comes in colors it will serve as a casual shirt as well.
Product Details (from ExOfficio.com)