They KILL your heel! I think other people here have mentioned this, but I'm a different person: I don't know what they did, but it HURTS A LOT, it's just awful. These things really hurt my left heel, I think because they lifted my back? I don't know, all I know is that these shoes are unwearable and their return period has expired so I screwed it up, was really pissed off and won't be buying Asics again. I'll replace them with Nike, Brooks or whatever.