I received these shoes and had intended to use them in a aqua zumba class. I tried on the right shoe, and noticed that the "pull" tab on the heel was not stitched tightly so I checked out the left shoe and found the same problem with it as well as the stiching around the ankle of the foot on the shoe was coming out. It was as though it just did not get stiched correctly that the machine may have been skipping stiches or that it just did not catch the mesh part with the binding part. Anyway, I was very disappointed and returned them with NO Problem with Amazon!! Thank you Amazon Prime membership for your rapid response and ease of returning this product.