I thought these were serviceable shoes but hadn't worn them for a while since I was between jobs. I put them on for an interview a few days ago and took a few steps. the part of the sole of the shoe under the balls of my feet literally shattered into dozens of rock hard &#34;rubber&#34; chunks strewn in my wake leaving the padding beneath clearly visible. It seems that during its brief disuse the already worn parts of the rubber bottom turned into some kind of hard rigid plastic.