Articles on polypropylene

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Layering face masks has been suggested as a way to increase protection against COVID-19 variants that may be more transmissible. (Shutterstock)

Are two cloth masks better than one for preventing the spread of COVID‑19?

Are two face masks better than one? Adding layers of filtration by double masking is a way of using the masks that we already have, possibly to better effect.
New recommendation advise using an additional layer of polypropylene fabric in cloth masks to act as a filter. (Sara Alas/Niko Apparel)

Polypropylene, the material now recommended for COVID‑19 mask filters: What it is, where to get it

Everything you need to know about non-woven polypropylene, the fabric now recommended for use as a filter in cloth face masks: What it is, what to look for and where to find it.

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