The CDC suggests using a bandana or t-shirt.
Coffee filters are one thing you’re free to add to your DIY face mask.
To begin, simply fold the fabric in half.

Then, cut your coffee filter in half, discarding the narrower bottom section.
After that, all you oughta do is fold the fabric in toward the center and tuck.
The health organization also notes that it’s important towash your face maskregularly.
