> 8% silver thread
Yes, I found that for me, the base layers I had with 8% silver did a pretty good job at keeping odor down. Alas, most of base layers with embedded silver are around 4% and they tend not to list % silver amounts. I found the treatments will less than 8% silver helped keep odor at bay for a day or so, but were not effective after a few days. I have tried really thin cotton and cotton/poly mixes. While better than the typically poly, they also got stinky after a few days. As other have observed, wool works pretty well. I often get a skin rash when wearing wool (even super fine merino) so I tend not to wear it, but there are trips I have worn a wool as a base. While the shirt did smell aren't a few days, it was much less than an typical poly or cotton shirt. Smell, well, a bit like a damp sheep. Not pleasant, but better than what I smell like after a few days.