the mask that can be cut from plastic sheet

thingiverse

You can cut a mask from plastic sheet. Plastic sheets like those used for file folders work well. Cutting machines, such as plotter or laser cutter, make the process easier. Alternatively, you can cut it by hand. To wear the mask, you'll need an elastic cord. If you choose a vent slit model, you'll also need cloth to cover your mouth. When making the mask, use hygienic materials carefully. I won't be responsible for any health issues caused by using this mask.