These are the most uncomfortable shoes ever. Always buy Nike and have never had an issue. I have a pair of Nike flex and they are amazing but I workout twice a day so I bought a second pair of shoes. Gave the Vomero a try. I only wear Nike but these shoes are horrible and now I am stuck with them because I wore them twice.How am I suppose to know how horrible they are unless I wear them? This is ridiculous. If I could go back I would buy a second pair of flex. Now I'm $100 down and in horrible pain. Think I am giving up on Nike. Wish I would have just bought another pair of flex.