They are the lightest shoes I have ever purchased. Because of this, I was concerned with how they would wear. They were delivered on 3/13/15. Since my purchase, I didn't wear them for 1 1/2 months, due to a hip replacement. Unfortunately, between 3/13 and 8/13, most of the treads are almost completely gone.  The soles are not wearing unevenly, however, so that is a good thing. Because of my recent surgeries, I thought I would get another pair.  However, the price has increased from the $68.81 that I paid in March to $77.28 today (8/13/2015).  A 12% increase is more than I am willing to pay for a shoe that wears this quickly. They are very light, though.