It’s been a few days I’ve used this product. I use these only for running and casual workouts. They are holding up really well. They are very breathable, light and thin, which is what I was looking for. I’ve hand washed it many times now and no threads or anything is coming out of it, so the quality is good. Fit for me is spot on. As far as the claimed special abilities of the socks, I don’t know about that yet.