These are just socks...nothing special.  They fit well in my Vibrams and reduce the friction caused by ordering the shoes too big.  These are so expensive though (for one pair) that I am not rushing out buying more.  I probably will eventually but as for now, I'll keep my money in the bank.  I also don't think they will last very long.  They feel like those really cheap socks that you get in a 10 pack.  Not very soft and so thin you can practically see through them.  But like I said, they get the job done.