I have two Vivobarefoot (one for summer and one for winter) and I love them. The summer pair has a 4mm sole.
Nice. I was looking at these when I ended up picking xero.
Looks like the soles are sewed to the shoe, my zeros were not
What you mean? I can send you a photo, but it's an old model
Is the upper cloth part sewed to the part of the bottom that wraps around the sides a bit. Now that I look closer that may be just a line. https://image.nostr.build/4ca21040f89cef9adb7ab736e6bafd61138327ace0a0e4f9d5c89183e9e90162.jpg