A surgical mask blocks about 80% of the viruses. A home-made mask blocks about 50%. And for children, a well-fitted homemade mask can outperform an ill-fitting surgical mask.
In order for a mask to filter particles out of the air going into your lungs, you must breathe in THROUGH the fabric. Researchers tested various household materials in single and double layers for effectiveness and breathability. They concluded that cotton fabric was the best overall choice for a DIY mask.
However, the tightness of cotton fabric varies. Pick your fabric(s) and use your best judgment about how many layers of what types. The video below uses two layers of quilting cotton, plus a third inner layer of cotton flannel. The instructions below call for 2 layers of woven cotton. Researchers who tested cotton tea towels found that one layer was best. Use your best judgment. You want filtration without suffocation.
















