One Piece respiratory mask for improvised reusable filters or 3M Filtrete

thingiverse

This design is meant to be printed in lower-flex thermoplastic polyurethane (TPU) using household materials to create a functional mask. Masking tape, twist ties, rubber bands or elastic, fabric - according to CDC guidelines for effective mask materials available at https://wwwnc.cdc.gov/eid/article/12/6/05-1468_article - are used without sewing, though I recommend it for reusable filters. My goal is that this design will provide a better fit than some fabric masks, eliminating gaps around the face where unfiltered air might enter the mask. If the fit isn't satisfactory, you can try dipping the end of the mask into hot water and placing it on your face to mold it better to your unique bone structure. Just be careful not to burn yourself. I also hope that this mask is comfortable enough to prevent tugging and fidgeting with the mask, which both contaminates the material and causes dirty hands to come into contact with the mucus membranes of the nose and mouth. TPU can be sterilized by dunking it in isopropanol (at least 60% isopropanol in water) and allowing it to dry completely. TPU is a hygroscopic material that absorbs moisture from the air, so higher alcohol content is better for sterilizing this material. This is an improvised mask, and I can't guarantee any results.