Just to be clear, imaref was concerned about the tightness of the big toe in his VFFs.
I like my Vivos well enough, but I find the NEOs both hot (fine in Winter) and loud when running. Which ones do you have?
I'm hoping for a quieter shoe, but maybe I'm hoping in vain. I'll bet they are all loud compared to bare feet. Part of the appeal of running barefoot is the quietness. I usually cough or say something to the dog when I'm about 50 feet behind someone on the running path so I don't startle them.
Bedrock huaraches may be my next purchase.
I have the neos, but I usually run with either a stroller or earbuds, so I don't notice the noise. I've never though they were hot, but that's compared to the new balances I had before I got them