Originally Posted by bch238

Synthetic fabrics smell bad when combined with sweat.

Originally Posted by Branko D

There are people who shower and put on deodorant before a ride and people who, to put it politely, don't smell very well That said, better fabrics seem more... resistant to smell. I have a bunch of cheap dry-fit running shirts (which does get me more sweaty because, well, moving a whole lot slower and all that) which I got participating in races and the like which will start to smell fifteen minutes after a run. The root cause might be that I often don't shower before a run but only afterwards, but the better stuff I have doesn't seem to smell nearly as readily after a run.