
I had a constant problem with calluses on the edges of my heels when running at top speed on a treadmill. (I have a back injury and my doctor told me to stop running.) I bought other socks that should have helped. Some got a little, some not at all. THESE socks are a REAL deal! I use them in combination with RunGoo foot cream which helps stop slipping and my heels are finally getting better! These socks aren't as thin as Thorlo, but they're worth every penny. They help A LOT with slipping and your feet REALLY seem to stay drier. I would recommend them to everyone. Be sure to wash them in cold water. Another bonus is that they are actually MARKED for right and left foot! These are GREAT socks!