Nike FlyEase, US8 It's listed as 25cm. The best fit is 24.5cm, and if you're a 25cm, it might be better for those with narrower feet. There's almost no wear on the soles, and it's been used very little, but there is some discoloration due to storage. The wear is minimal, so it's more like stains that occurred during storage rather than dirt from use. Aside from that, I think it's in very good condition. I'm selling it at a low price. There is no original box. From the following site: Hands-free on and off: The heel of the shoe (including the sole) opens wide with a bi-stable hinge, and you can easily put it on by simply stepping into the "diving board" part and locking it. When taking it off, you can unlock it by stepping on the "kickstand" on the heel, allowing you to take it off without using your hands. Design Background: This "FlyEase" technology was originally developed to make it easier to put on and take off shoes, based on the opinions of athletes with disabilities.