There must be a manufacturing flaw in this model. A portion of the tred of both shoes has separated after a couple days of use.  I purchased these for my wife, who only wears Saucony for tennis, running, and walking. This problem has not shown up for any of her other Saucony's, so it might be just this model.  Unfortunately, because my wife did not wear them for a few weeks, and then discovered the problem after the first time she wore them, it was past the window for when the seller would take them back.  I tried using some shoe goo to resolve the problem, but that didn't work.  She loves the color and style.  If it didn't have this problem, it would be a five star review.