When I retrieved the box from the front porch I thought, fine, this time they've sent a box with nothing in it but I was wrong. It contained the lightest pair of shoes of any sort I've ever had on my feet, even flip flops seem heavier. Socks seem heavier, sand from the beach feels heavier; In short, they're light. But that's the easy and obvious, the more intelligent is the very clever way ergonomics has been worked to provide a shoe with support that isn't obvious but, when you walk or jog in them, the correctness of their construction is apparent. This is a shoe that melds to your foot, carresses it, moves with your foot but is sufficiently sturdy to not allow the foot to easily get out of alignment. I'm particularly impressed with the way the arch is constructed to roll with the foot without hindering the natural motion but still keeps one grounded, ready for a curve or an elevation.

Certain other reviewers have said that their manufacture is also their Achilles Heel in that over a period of time they don't stand up well. And that's possible. But they are advertised as being light weight, which they are, and one cannot expect something this gentle on the foot and on the ground to have the durability of a heavier, denser shoe; Just in standing in one place I could feel the air move over my feet, something I've never experienced before. For the determined long distance runner then, yes, it's easy to see how these will not wear as well. But for the runner who circles the block or their neighborhood, these are just fine.