I just know that this one is comfortable and fits well. First of all, they smell terribly of chemicals, they dont arrive in a box so they came in just a shipping envelope and were squished and one of them was so compressed it had widened to where it wont fit my baby. For the person not sure about this product for the price point. My only issue is that theyre a bit on the small side - Im a size 14/16 and the L size is very clingy. I replaced both the screw and nut. What a piece of junk. If this is all you can afford, its a good purchase. I like the boom type mic, and I was also needing one with USB. In general all Teva sandals are awesome and these are no exception. It has more heft and somehow even more solid feel to it.