I am an Etsy seller and mong other items, I sell cotton face masks. In the beginning, I used pipe cleaners for the nose bridge. One of my customers, who was a nursing assistant, was not very happy with the pipe cleaner and discovered this stainless steel insert. She ordered it and promised to let me know if it worked with my masks. A few days later she happily reported it worked great. My masks have a casing inside the filter pocket, where the nose bridge piece can be inserted and removed if nee...