Maybe I smell more than you guys but I can make wool pretty rank. Luckily I now live where it isn't cold so I don't need any long underwear. :-) I wear cotton next to my skin and use bleach to kill everything in the wash. Works well for me although some people freak at cotton.

My mountaineering poly pro is over a decade old and I have been told smells interesting from traveling to various corners of the globe--and wearing for weeks at a time. ;-)