I have only tried this on, so have not had the chance to test their durability. But they fit! (insert happy dance). I have, what I call 'alien feet' - diamond shaped with an EEE forefoot and narrow heel and ankle. These slide right on and fit in the right places. I dont necessarily need the wide calf, but I have to say, as a bigger girl anyway, it is nice to have the extra room. The packaging was good and delivery went smoothly, so I have no complaints at all! I recommend the product and provider.