When I first tried them I wanted to return them but forgot they were very tight but after some use they loosened up a bit but still didn't feel as comfortable as my GTS Adrenaline -Streamers. After meeting with a sports doctor, she told me that there are two causes of overpronation and that the problem these shoes are targeting is not the one that caused my overpronation. Simply calling it overpronation can be confusing and doesn't always help.