We've upgraded our DIY face masks to accept metal strips to form better fits around the bridge of your nose. The problem is that I don't like to have them installed when they are in the washer. So, we made a hanger/organizer for them so when they are removed, they can be stored close by. Here are the strips we recommend and use in our masks: https://smile.amazon.com/gp/product/B08BR3SSDZ/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1
Two sizes are included.... and both accept rare-earth magnets that are 8mm diameter by 3mm thick (press-fit).