There is a problem. I bought 7s and when I dont wear socks my heel moves up and down in the shoe. While this isnt to big of a problem, I am sure if I walked more than a mile it would rub raw/blister/etc. I tried a 6.5 but my foot is to small to fit. I tried tying them tighter but it hurts the top of my foot (past uncomfortable) how tight it has to be. With socks and when my feet are wet this isnt a problem. However summer is coming soon and I'm sure Ill want to rock these for an extended period of time outside without socks/water What should I do?