Health
Coronavirus: What You Need to Know About Face Mask Choices
Which one? We conducted extensive testing on face masks on the market and raised some concerns about their effectiveness. Consumer groups outline what consumers need to be aware of.
Reusable face mask and coronavirus
Keep in mind that coronavirus particles can be much smaller (about 0.1 micrometers in diameter), so we are not measuring the very ability of the face cover to protect against coronavirus.
The face cover is not a medical device and is not designed to block all particles down to these ultrafine particles like a high quality medical respirator mask.
Similar to a basic disposable surgical mask, to provide community protection by blocking large droplets and aerosols emitted by potentially asymptomatic wearers and minimizing the exhalation of viral particles. Is aimed at.
Basic surgical disposable face mask
Disposable surgical masks must comply with strict filtration standards for sale, but reusable cloth masks do not have such binding standards. However, surgical masks are disposable, non-recyclable products and are not practical solutions for everyday use. It can also have a significant impact on the environment if millions of people are finally landfilled.
At around 45p per mask, the cost of using a disposable once a day during the year can be £ 164. This is significantly higher than Best Buy’s reusable face cover, which comes in 3 packs for £ 15.
How to choose a reusable face cover
Try to have 3 layers, but at least 2 layers. Our tests have shown that there is a clear difference between a single layer face cover and a two or three layer face cover.
Choose your material wisely – a tightly woven cotton is a good choice – the homemade masks we tested worked well with filtration – and the worst performing masks were mostly single layers of polyester. Ideally, it is a combination of different fabrics such as cotton, polypropylene and different types of polyester.
Make sure it is adjustable or different in size. Testers rated the face cover for fit and comfort when adjusted, either by ear loops or moldable nose wires, or because of different mask sizes. For more information, see the Face Mask Purchasing Guide.
How?Test the face mask
Which is the best way to filter bacteria? An aerosol generator was used to fire 3 micrometer diameter bacterial particles in the mask fabric section to see what percentage of the bacteria had passed.
Which is the best way to test breathability? The pressure required to draw air through each cover was measured at a rate of 8 liters per minute. This is 2 liters above average breathing volume.
To find out how long the mask will last with repeated use, the tester puts on and takes off the mask 80 times and fits testers with different face shapes to understand how comfortable the face cover is. I asked you to evaluate the feeling. Gap and ease of adjustment.
Which one? Also, look for people who are comfortable wearing and talking, and who are wearing glasses.
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