I have to agree with Pootz, I have noticed the 'high tech' clothing retains smell...especially polypropolyne. On the trail their is NO reason not to wash up at LEAST once or twice a week in towns. I wash my hands everyday with sanitizer and put some on my armpits (it works)...haven't tried 'south of the border'..kinda afraid to see what would happen. Personal wipes for there at least every other day. There is no reason to REALLY STINK bad.