Masks that filter out viruses, such as the Coronavirus, have been used to protect healthcare workers and others from catching the virus. In this article we discuss how they work, who should use them and when they are effective against different types of viruses.

Filtration

The number of air particles that can pass through a mask is measured by the amount of resistance to air flow. A mask with an N95 rating will block 95 percent of the smaller particles, so it should be able to remove most dust, pollen and mold from your surroundings.

How does this work? The filter in your n95 mask has microscopic pores that trap particles like dust and pollen as they come in contact with it. Filtration masks are tested using ISO 7176-2:2013 standards by filtering air through a sample of each type of particulate matter under controlled conditions.

Masks come in different sizes according to head circumference but all require regular replacement since they become worn out over time due to use; if not replaced regularly then protection levels will decrease significantly making them ineffective against particulates such as viruses or bacteria which may cause serious diseases such as flu or pneumonia if breathed into lungs at close distances over long periods – especially when you’re sick yourself.

Breathability

To test the breathability of a mask, take it outside and put it on your face. If it’s cold out, you can use a hand-warmer to simulate your normal body temperature. Then do jumping jacks for 30 seconds. If you don’t feel like doing jumping jacks, try the following:

• Put the mask on your face, then hold a straw one inch from your nose. Take deep breaths through the straw until you can’t anymore.
• Remove the mask and count how many seconds pass before you start panting/gasping for air—that’s how long it took for oxygen deprivation to kick in.

Fit

The N95 mask should fit snugly to your face, so it does not leak air. It should be comfortable, with a soft and pliable material that will not irritate your skin or cause chafing during use. It should also be easy to put on, take off, and adjust for a comfortable fit around the nose and mouth. Remember: if you can’t breathe comfortably through the mask because it is too tight or too loose, then you’ll have trouble getting enough air for optimal protection against viruses when you’re wearing it.

Protection from water droplets and particulates

The N95 mask is an effective tool for protecting against particulates and water droplets. Particulates are small particles of dust, dirt, smoke and other materials that can enter your body through the air you breathe. These particles can cause many health problems including lung cancer in high doses or long-term exposure over time. Water droplets contain viruses such as the flu virus that may cause you to get sick if they enter your respiratory system while you are wearing a N95 mask.

When you’re shopping for a mask, look for one with the protection level that fits your needs. If you want to be extra safe and buy two masks, one N95 mask will protect you against both particulates and water droplets while another can protect against water droplets only.