Unrelated: Roofers in Australia started wearing an early tennis shoe that was cotton canvas with a sole that emulated a rubber tire. It became so popular they made a steel toed version. Only steel toed tennis shoe I know of. https://volley.com.au/products/safety-canvas-black-grey?vari...

The regular ones are fantastic by the way. Very comfortable, insanely flexible and grippy. But they do tend to fall apart quickly. In AU they're very cheap, but more expensive for us.