These are great!!!  The support is wonderful and I'm picky, having had plantar fasciitis in the past.  I usually wear Vionic flips and these are just as great, if not better. Whatever the sole is made out of is very comfortable and feels good against the skin of my foot. No blisters and they stay on really well. I thought that I'd wear these for day to day stuff but not for big time walking around but I've changed my mind. I would wear them for walking around all day. I bought the basic black and gray to be neutral, but I'm already deciding whether the orange or the teal is next.  I feel that they run true to size.