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title: ""The best masks were constructed of two layers of heavyweight…"
date: 2020-04-03
source: facebook
type: Archer T. Ships shared a link.
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# "The best masks were constructed of two layers of heavyweight…

*April 3, 2020 · Facebook*

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[https://nbcnews.to/2X99aiW](https://nbcnews.to/2X99aiW){target="_blank"}
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\"The best masks were constructed of two layers of heavyweight \"quilters cotton\" with a thread count of at least 180, and had thicker and tighter weave.\
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Lesser quality fabrics also worked well, as long as they had an internal layer of flannel.\
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\"You do want to use a woven fabric, like batik,\" Segal said, \"but you don\'t want to use a knit fabric, because the holes between the knit stitches are bigger.\"\
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In other words, if the fabric allows for a substantial amount of light to shine through, it\'s probably going to allow tiny viral particles through, as well.\
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Other hospitals, such as Vanderbilt University Medical Center in Nashville, have also suggested using tightly woven fabrics for do-it-yourself facial coverings. Kaiser Permanente has also published instructions on DIY masks, also calling for two layers of cotton fabrics.\"
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