This is my second pair of Shape-ups.  The first pair lasted several months but the cushion started rotting and smelling horrible.  I thought it was because they had gotten wet a lot at work so I bought this new pair when it became on sale.  I loved this pair originally because they are soooooo comfortable.  Unfortunaltely the same problem occurred about six months later - the cushion started to rot even though these had not been wet.  I am still wearing them but the entire front of the one shoe has no foam left between the inside of tjhe shoe and the rubber bottom and now squeaks when I walk.  As comfortable as they are I will not be buying another pair of Shape-Ups in the future.