Universal Respirator Remix / Paracord / M3 Threaded Insert

thingiverse

This revision is optimized for utilizing paracord instead of elastic band due to sourcing difficulties caused by the current pandemic. The design also incorporates M3 4mm threaded screw inserts, which eliminates the issue of randomly popping off nuts that occurred with the original M3 screws. Special thanks go to 3D handyman for his excellent design, which I've incorporated into this mask after testing numerous designs in my own 3D printing endeavors. To enhance filtration and prevent micropores, I've added a layer of cotton fabric on both the inside and outside of the mask, while utilizing MERV 13 HVAC filters. As an ER nurse, I face severe shortages of PPE supplies, and the quality control for existing masks is questionable due to their tendency to fall apart when put on. This design has been fit-tested at my workplace and consistently provides a level of protection exceeding that of non-N95 masks. Its comfort during 12-hour shifts is also notable, although some moisture buildup occurs inside the mask. I deliberately chose not to include an exhalation valve to maintain the intended effect of the mask.