These are the best fabrics to use for your cloth masks, according to researchers:
These particles, called aerosols, can travel hundreds of meters through the air. Additionally, aerosols within 10 nanometers to 10 micrometers in size are respirable, which is to say they can be breathed into the lungs. So wearing a mask over the mouth and nose which prevents inhalation of particles containing the virus can be crucial to preventing infection.
When each fabric was used in a single layer, high thread count cotton performed the best with a filtration efficiency of around 80% for particles larger than 300 nanometers. However, the fabric samples performed even better when layered, especially in hybrid combinations. One layer of cotton with two layers of silk was effective at filtering greater than 90% of particles larger than 300 nanometers.
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