According to the Centers for Disease Control and Prevention (CDC), you should only double mask by wearing a cloth mask over a surgical mask. The best types to use include a three-ply cloth mask and a three-ply disposable surgical mask.
In addition to providing multiple layers of protection, the cloth mask covers the gaps around the mouth and nose not covered snugly by a surgical mask, where respiratory droplets could escape. To prevent COVID-19 transmission, your masks should fit snugly against your skin or facial hair.
Wearing two masks allows for both higher filtration and better fit, Robert L. Quigley, MD, DPhil, senior vice president and global medical director of International SOS, told Verywell. “Adding more layers reduces your exposure to respiratory droplets, containing the virus, released from an infected individual who coughs in your space,” he said.
What Not to Do
The CDC advises against double masking with two disposable surgical masks. They are not designed to fit snugly against your face, and combining two wouldn’t help cover any gaps.
The CDC adds that you never wear another mask over a N95. This can block the respirator and make it difficult to breathe. An N95 is enough to protect you by itself.
Respirators like KN95s and N95 might also not be the right choice if you have a medical condition that makes breathing difficult.
“If you are someone who experiences trouble breathing, double masking may be a better alternative option,” Quigley said.
Testing the Fit of Your Masks
It’s a good idea to test your double masking method at home to ensure that the fit is right and that your breathing and vision aren’t affected.
Jyotsna Shah, PhD, president and laboratory director of testing company IGeneX, recommends a simple method of cupping your hands around your mouth and breathing with your masks on.
“If you feel any air escaping, tighten your nose bridge and ear loops, or find a better-fitting cloth mask,” Shah told Verywell.
Quigley similarly suggests a breathing test.
“If the mask pulls toward your face when taking a deep inhale, it is a proper fit,” he said. “Making sure that you can breathe clearly with a mask on can also help to ensure that your mask is fitting right. Difficulty breathing in a mask could cause movement, leaving gaps.”
The information in this article is current as of the date listed, which means newer information may be available when you read this. For the most recent updates on COVID-19, visit our coronavirus news page.
