I have worn wool socks and boxers for the last few years almost exclusively, and they've done well in environments from -20°F (Canada) to 140°F (Iraq). Now that I have started upgrading my wardrobe and realize that the white crew neck collar showing beneath a polo or button down is not the best look, I'm hard pressed to find a V-neck wool undershirt. In fact, the only one I've found so far might as well be a crew neck and it's still white: http://www.smartwool.com/mens/mens-microweight-v-neck.html So please tell me, am I missing something? Is there a reason that wool should not be my undershirt of choice? It cools in the summer, warms in the winter, never stinks and wicks moisture from the skin. SmartWool also makes an A-shirt but that doesn't protect from sweating through the armpits of a shirt. And if it agreed upon that wool is an acceptable undershirt material, does this shirt exist? If so where? While searching for this information in threads already started I have come across a surprisingly high number of people that HATE undershirts. That's fine, please don't say "stop wearing them". I'm not going to stop wearing them. I'm not sweating through the armpits because I'm fat, out of shape, or have over-active sweat glands. I'm sweating through because it's 120° and I don't spend my time exclusively indoors, behind a desk, or around climate control.