these are so significantly different that original Birkenstocks that they have no business being grouped with the originals. Look: I would say very good. Once I did that they were smooth from there on out! The muffs do not make my ears and head hot, but they are really comfortable. I needed them to keep my feet supported & they have done the trick I prefer to wear them with a short pair of socks but I?ll be making more purchases of Crocs! When I put these on my feet are instantly more comfortable, and after walking around for a short time, much of the fatigue is gone. I love how it came with the cord for mobile use and doesnt look like gamer headset when out and about. Seriously, I havent itched since, amazing, and not too much impresses me. The outer band is lined and cushioned on the inside, as well.