I've used these for only exactly 7 week-days now and they've already been worn down considerably. I don't even walk all that much: twice a day to and from the bus-stop and a couple of coffee runs around a carpeted office a day is all; the rest of the day is either just sitting at a desk or shoes off. The soles are fine and seem hardy enough, but the black synthetic layer is just peeling off on its own. The price tag may have been low ($29.99), but this product is still no where near worth it.