Thread-through filter holder for DIY masks

thingiverse

Effective filters are actually quite restrictive, resulting in A) oxygen deprivation or B) labored breathing through makeshift gaps in your mask. Why waste hours on a 3D printer when you can quickly sew one together? Using leather as the material will make it virtually impervious to viruses. A tetrapak carton can also serve as an alternative since it's completely waterproof. If you're using old jeans, applying paraffin paint will provide a water-repellent finish. Considering your options, combining two layers of non-woven fabric with a coffee or vacuum cleaner filter in between should suffice for adequate protection. If you have access to an old Singer sewing machine, learning how to thread it can yield superior results compared to any 3D printed mask available online.