Home-made face coverings need to be at least two layers and preferably three to curb the spread of Covid-19, new research suggests.
Experts found one layer of cotton T-shirt material is fairly effective as a barrier against droplets expelled during speaking, but two are "significantly better at reducing the droplet spread caused by coughing and sneezing".
Three layers would be even better, the researchers said, and their study found surgical disposable masks offer the best protection of all.
In England, the Department of Health has published guidance for the public on how to make a home-made mask. It recommends "two or three 25cm x 25cm squares of cotton fabric" sewn together and attached to the ears with elastic.
Read more on mirror.co.uk