Sorry guys, I will disappoint the fanboys, but this is perhaps the worst purchase I have made here. The only positive is the quality of the thread and that they don't retain odors. Other than that, they don't stay on the heel even with sacrifices to the gods. Even with the silicones (crazy gimmick) they've put in to prevent slipping on the heel, by the 5th step the sock has already taken a trip inside the shoe. This is my personal opinion after using them for a month. And to get ahead of the cunning ones, I got them in the right size, yes. If it matters, they were worn in a Stan Smith type shoe