From https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/ https://smartairfilters.com/en/blog/diy-homemade-mask-protec... > Data sh

From https://smartairfilters.com/en/blog/diy-homemade-mask-protect-virus-coronavirus/ https://smartairfilters.com/en/blog/diy-homemade-mask-protec... > Data shows that homemade masks made with a single layer of cotton clothing, or a tea towel can remove around 50-60% of virus-sized particles.