I use one of these, part leather part fabric, no problems and well made.
https://www.peakdesign.com/products/cuff
The beauty of a peak design leash or strap is when you are not using the camera or strap, the strap is easily removed and you can stow your camera in its bag or pouch. When using your leash on your camera the alloy part of the leash is up around your wrist, do you remove your watch or any rings, bracelets etc when using a camera. I have had no mishaps or marks made to either my D300, D850, GFX, or X100v in the past four years I have been using pd straps.I have something similar having a metal wrist adjuster - Scratchful city! Is there something similar with no metal at all?