I found that my feet sweat easily and leather insoles were pretty close to 1MOhm. So I took some old leather shoes and they passed most of the time. ( 0.5M to 5M as I recall)
I implemented ESD in our factory in the late 80's and they subsidized the shoes, (which were supplied over priced ($250), but the leather oxford's I picked were extremely comfy that I still have them in good shape.
If you have a bit of salty water added to comfy old leather shoes with leather insoles and bottom soles, that might pass if they are connected.
Like most shoes you might need to try them . they look pretty wide, so it should not be tight.
Some black soles tend to mark floors, ask if they are no-mark type.