i normally wear these kind of socks for biking and running.  i own a pair of the cotton ones, but i want to switch to marino wool to avoid having to wash socks every day.  first off, i ordered the wrong size (all my fault).  i am a 12 and should have ordered a large, however, i also ordered a pair from smart wool and that was an xtra large and it fits fine.  secondly, these are a little thicker than the cotton ones, so it didn't feel as good when running, but biking felt fine.  finally, these didn't hold any bad feet smell, but they did smell "new" even after a couple of washes.  i would describe the smell like formaldehyde, or some kind of chemical smell.  i washed them with other clothes and the other clothes picked up on the formaldehyde.  i will hand wash these until the smell goes away, but the sock rocks.