Noisy shoe!! Wow these shoes make a ton of noise walking, they squeak, and make passing gas sounds. Both sides do this. The inner sole must be somehow separated from the outer sole and have an air gap that flexes open in walking. I work on concrete, the sole is durable but hard. It sounds like you have on boots when walking on hard surface. The comfort of the cushioning is decent, my feet feel fine after a day in them. I just wish I could walk down the hallway without all the noises made by the shoe. When I tell you they are loud I do honestly mean they are loud!! Coworkers will hear you coming a mile away!