I love these socks. I walked in them for 10 miles one day and they never slipped. They are a true no-show sock. I've bought several kinds of no-show socks that still show over the tops of my sneakers and these don't. My only warning is that they shrink up in the wash a bit. I try not to put them in the dryer and they are fine. I'm ordering my third pack today and I'm going one size up from what I need so that I can dry them. I'm a shoe size 7 and got the small size last time and once dried they are a bit snug.