Are there any hair accessories that are not ok for nurses to wear at work?

Nothing large or not fully secured. No clip in extensions. I used to do large flat barrettes to pin sides up on top of my head, plain rubber bands ( want something to keep it secure. ) bun with Bobby pins. Basically you don’t want to be messing with your hair all shift or have it get caught or pulled (dementia patients will grab anything they see and not realize it is attached to you!)