Sloppy shoes. The whole construction is sloppy.

1) The reason people think these shoes are more comfortable than normal shoes is because the sole is too soft. But that also reduces the support to the food. Secondly, it increases the amount of movement of materials around the foot.

2) In addition to that, the insole has perforations. That increases friction of the insole with the base of the foot.

3) On top of these two flaws, the shoe is sized weird. If 11 is not 11, then why are you marking it 11?