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Kn95 Masks : 10 Things To Check Before Buying

KN95 Masks: Note: In many cases Kn95 masks are a Better and More Cost Effective Solution than a N95 Mask which traditionally has been the standard for medical professionals – here are some things to consider:


  • KN95 masks provide 95% protection against all particles that are greater than 0.3 m in diameter. This is an effective barrier against bacteria, viruses, pollution particles, fine particles, dust, smog, pollen, etc.
  • The term KN95 stands for the regulatory standard for filtering face piece respirators that are certified in China.
  • Typically KN95 masks have a 3D foldable design, earloops, nose bridge/nosepiece, and provide excellent fitting and sealing.
  • The masks feature 5-layer protection and are skin-friendly (don’t cause rash and skin irritation).
  • Currently approved by the WHO as a safety measure from COVID-19; used by health care providers, patients, and citizens.
  • Currently advised by the WHO for extended use and reuse.

1. What Does KN95 Mean?

KN95 stands for the regulatory standard for filtering face piece respirators that are certified in China. The regulatory standard ensures filtration efficiency, a tight seal with the face as well as minimum leakage.The certification applies in terms of use against non-oily particulates, as well as the current use against the COVID-19.These requirements for a KN95 certification are almost the same as the requirements for the US N95 filtering face piece respirators.That is why both KN95 and N95 provide the same levels of protection, according to international standards and certifications.

2. What Is A KN95 Mask?

KN95 respiratory masks are masks that are regulated by the Chinese government under regulations GB2626-2006, GB262-2019, and GB19083-2010. These masks have become available worldwide since April 2020 to help fight the COVID-19 pandemic.Healthcare professionals extensively use the KN95 filtering facepiece respirators since they meet the FDA guidelines and international standards.The KN95 mask fits tightly around the face and thus create an airtight seal. This mask features an earloop fastener, whereas other types of masks that use head strap attachments.Many favor the KN95 mask design due to how easy it is to put on. It also fits very well from the nose to the chin area preventing particles from bypassing the mask filter.

3. What Does A KN95 Mask Protect You From?

The KN95 mask design provides effective respiratory protection against all sorts of particles, including bacteria and viruses.The KN95 masks provide 95% protection against all particles that are greater than 0.3 m in diameter.This means it is an effective barrier against bacteria, viruses, pollution particles, fine particles, dust, smog, pollen, and reduce the risk of bacteria and viral infections

4. What Are KN95 Masks Made From?

The KN95 masks are multi-layer masks, that usually feature 5-layer protection. The layers are made from high-quality, nonwoven fabric, hot air cotton, and melt-blown fabric.The nonwoven fabric is hydrophobic, and is water- and droplet-proof. Moreover, the hot air cotton is soft and ensures lower air velocity. Further layers ensure particle filtration and hypoallergenic materials, that are skin-friendly.Such a layered fabric construction contributes to the mask’s particle filtering efficiency and a generally better design. Speaking of design, the KN95 mask has a 3D foldable design, as well as an adjustable nose bridge clip to fit the face better and firmer.Unlike other masks, the KN95 mask features an elastic earloop. This further ensures a tight and firm fitting to the face, from nose to chin area.Note: Some KN95 masks have 4 instead of 5 layers. However, these 4-layered masks are generally cheaper, and not recommended for use against COVID-19. The WHO and CDC recommend respiratory masks with 5 layers only.

5. How Long Can You Use A KN95 Mask?

Both the US N95 and Chinese KN95 masks are manufactured and designed for one-time use (disposable design).This means that each new use would normally require a new mask. However, because of the shortage of the N95 and KN95 masks, the CDC has recommended reusing disposable masks as a crisis capacity strategy.Strategies for the extended use of masks like N95 or KN95 are available at

The National Institute for Occupational Safety and Health (NIOSH) According to NIOSH, the N95 and KN95 can be reused (only if properly stored between uses and only if used by one and same individual), and used for an extended period of time. Thus an individual may wear the same mask for a continuous period of time in one day, after which the mask should be disposed of due to repeated exposure and close contact.

6. Is KN95 Mask Efficient?

KN95 mask design have at least 95% filtration efficiency. This makes them just as good as the N95 masks (97% filtration efficiency) and better than surgical masks (95% filtration efficiency) and PM 2.5 filter masks (approximately 60% filtration efficiency).Generally, these masks are very effective against airborne particles, viruses, and bacteria. Their efficiency was tested and proven through international regulations and regulatory standards of FDA, CDC, etc.However, studies have shown that the filtration efficiency of KN95 masks drops after sterilization or extended use. The filtration efficiency can drop even 50% post-sterilization.The simple reason, filtering facepiece respirators are designed for one-time use and should then be disposed of.That is why caution should be exercised when reusing or sterilizing respiratory masks.That is why the CDC recommends extended use only if the mask maintains its fit and function and is properly stored between use (if it’s being reused).

7. Does WHO Recommend KN95 Masks Against COVID-19?

The WHO has provided guidance and available evidence when it comes to the use of respiratory masks like KN95 as a protective measure against COVID-19.So far, what they know is that these masks should be effective against virus transmission and for protection against infection.These masks are being used by health care providers. And since it is believed that they protect from at least 95% of all particles, bacteria, and viruses, their use will be continued.However, the WHO states and emphasizes that there are currently NOT ENOUGH studies to evaluate the effectiveness of respiratory masks like the N95 or KN95 against Coronavirus in particular. However, they still advise that these masks should be worn as a part of the protective measure strategy in regards to infection transmission and the prevention of virus transmission among health care providers, patients, and citizens.

8. How To Handle KN95 Masks?

According to the Crisis Standards of Care by CDC, decontamination recommendations in regards to handling a decontaminated mask are as follows;

  • Before and after touching or adjusting the respiratory mask, you should clean your hands with soap and water, or an alcohol-based sanitizer with at least 60% alcohol.
  • Avoid touching the inside of the mask.
  • When touching and adjusting the mask, make sure to use a pair of clean (non-sterile) gloves.
  • Visually inspect the respiratory mask to see whether its composition and fitting have been compromised.
  • Make sure to check whether the mask components like the nose bridge, straps, and nose foam material did not degrade (which can compromise the mask efficiency, quality of the fit, and seal).
  • Always make sure to discard a used respiratory mask properly and never leave it exposed, where other people can touch it or use it.

9. How To Spot A Counterfeit KN95 Mask?

Not all KN95 masks and brands available on the market are authentic, and due to the shortage of the masks, there are many counterfeit KN95 mask brands. Some of the signs that a respiratory mask is counterfeit are the following;

    • No markings on the filtering facepiece respirator mask whatsoever,
    • There is a NIOSH logo or a TC number on a KN95 mask (Only on an American-market N95 mask will you see a NIOSH logo)
    • There is an FDA logo on the box or packaging of the mask; FDA does NOT approve the use of the administration label on any respirator packaging,
    • Presence of decorative fabric or other decorative add-ons (e.g. sequins),
    • Claims that the mask is approved for children (NIOSH does NOT approve any of the respiratory protection for children),
    • There are straps for ears instead of earloops for KN95 masks

Here are some further tips on how you can test a KN95 mask to see if it’s fake:

Flammability if a mask is KN95 certified when exposed to a flame it should melt but not ignite. Counterfeit KN95 masks are made from cheap materials and will ignite when in contact with a flame.Permeability if a mask is KN95 certified, it should limit the airflow going in and out of the mask. You can test this by trying to blow out a candle or a flame of a lighter by blowing through the mask. With a KN95 rated mask, you shouldn’t be able to blow out the flame no matter how hard you blow.Liquid resistance if a mask is KN95 certified, it will have a waterproof layer that will prevent the passage of fluid. You can test this by pouring some water into the mask. A certified KN95 mask will contain all the water with no leakage, while a counterfeit mask will allow the water to flow through the mask.

10. How Do I Get A Proper Fit With A KN95 Mask?

To put the KN95 mask properly, make sure to do as follows:

  1. Wash your hands thoroughly with soap and water or alcohol-based sanitizer before putting the mask.
  2. Hold the earloop mask and nosepiece facing up and place the mask under your chin.
  3. Stretch the earloops over each ear.
  4. Position and adjust the mask on your nose by using both of your hands. You should mold the nosepiece to the shape of your nose and push downwards on both sides of the nosepiece.
  5. Always perform a fit and seal check by placing both hands over the face mask. Make sure not to move or disturb the position of the mask. You can test whether the mask fits properly by exhaling; if there is air leakage, then make sure to adjust the mask again, especially the nosepiece.

Source: https://www.terrycralle.com/kn95-mask/

How Does a KN95 Compare to an N95 Mask?

“The KN95 is practically equivalent to N95 in every aspect,” says Amin. “Customers seem to believe that the N95 is superior at blocking airborne particles, but the KN95 is just as good, if not better,” he insists. “Many N95 [masks] are also made in parts of China and Asia so the notion that all N95 are U.S.-created is inaccurate as well.”The FDA has released a list of approved N95 masks here

Source: https://www.rollingstone.com/product-recommendations/lifestyle/n95-vs-kn95-masks-1044184/ See also https://ppe4wholesale.com/kn95-3ply-masks/ for wholesale purchases of our 3 Ply Surgical Mask and KN95 product line as well as the CDC [Center for Disease Control] KN95 test results for our KN95 manufacturer.

One Chart Shows The Best And Worst Face Mask Types, Based on The Latest Research

author logo
ARIA BENDIX, BUSINESS INSIDER
8 SEPTEMBER 2020

A simple trick can reveal whether your face mask offers sufficient protection: Try blowing out a candle while wearing it. A good mask should prevent you from extinguishing the flame.

The rule isn’t foolproof, but it should help weed out masks that aren’t very protective.

Ever since the Centres for Disease Control and Prevention (CDC) began recommending cloth masks for the general public in April, researchers have been evaluating the best materials for filtering the coronavirus.

An ideal mask blocks both large respiratory droplets from coughs or sneezes – the primary method by which people pass the virus to others – along with smaller airborne particles called aerosols, which are produced when people talk or exhale.

It should be sealed around the nose and mouth, since any gaps, holes, or vents could allow droplets to leak out and potentially infect another person.

Assuming masks are worn properly, certain materials consistently perform better than others in studies. Based on the latest research, here’s a ranking of the best and worst face coverings:

5f513b59e6ff30001d4e6ef2(Yuqing Liu/Insider)

‘Hybrid’ masks are among the safest homemade options

As a general rule, mask fabrics should be woven as tightly as possible. That’s why fabrics with higher thread counts are better at filtering particles.

It’s also preferable to have more than one layer. The World Health Organisation (WHO) recommends that fabric masks have three layers: an inner layer that absorbs, a middle layer that filters, and an outer layer made from a nonabsorbent material like polyester.

N95 masks are the most protective because they seal tightly around the nose and mouth so that very few viral particles seep in or out. They also contain tangled fibres to filter airborne pathogens – the name refers to their minimum 95 percent efficiency at filtering aerosols.

A recent Duke study showed that less than 0.1 percent of droplets were transmitted through an N95 mask while the wearer was speaking.

That’s why they’re generally reserved for healthcare workers.

Disposable surgical masks are also made of non-woven fabric. A 2013 study found that surgical masks were about three times as effective at blocking influenza aerosols than homemade face masks (that was true, at least, when air flow was slower than a cough but faster than a human breathing during light work).

Still, there are homemade options that come close to the level of protection of an N95 or surgical mask.

An April study from the University of Chicago determined that “hybrid” masks – combining two layers of 600-thread-count cotton paired with another material like silk, chiffon, or flannel – filter at least 94 percent of small particles (less than 300 nanometres) and at least 96 percent of larger particles (bigger than 300 nanometres). Two layers of 600-thread-count cotton offer a similar level of protection against larger particles, but they weren’t as effective at filtering aerosols.

That study, however, conducted measurements at low air-flow rates, so the masks might offer less protection against a cough or sneeze. Still, multiple layers of high-thread-count cotton are preferable to face coverings made from a dishcloth or cotton T-shirt.

Fabrics like silk or cotton have more variable performances

June study published in the Journal of Hospital Infection found that masks made from vacuum-cleaner bags were among the most effective alternatives to surgical masks, followed by masks made from tea towels, pillowcases, silk, and 100 percent cotton T-shirts, respectively.

Research from the University of Illinois, meanwhile, found that a brand-new dishcloth was slightly more effective than a used 100 percent cotton T-shirt at filtering droplets when a person coughs, sneezes, or talks. That study (which is still awaiting peer review) also found that a used shirt made of 100 percent silk was more effective at filtering high-momentum droplets, likely because silk has electrostatic properties that can help trap smaller viral particles.

The University of Chicago study came to a different conclusion, however: Those researchers found that a single layer of natural silk filtered just 54 percent of small particles and 56 percent of larger particles. By contrast, four layers of natural silk filtered 86 percent of small particles and 88 percent of large particles at low air-flow rates.

Bandanas and scarves don’t offer great protection

Bandanas and scarves have performed poorly in multiple studies.

The Journal of Hospital Infection study found that a scarf only reduced a person’s infection risk by 44 percent after they shared a room with an infected person for 30 seconds. After 20 minutes of exposure, the scarf only reduced infection risk by 24 percent.

Similarly, the Duke researchers found that bandanas reduced the rate of droplet transmission by a factor of two, which makes them less protective than most other materials.

For the most part, though, any mask is better than no mask, with one notable exception: The CDC cautions people not to wear masks with built-in valves or vents.

Masks with one-way valves can expel infectious particles into the atmosphere, helping to fuel transmission.

Mask studies should be taken with a grain of salt

Although research is coalescing around the idea that a few types of masks offer the best protection, it’s not always easy to simulate how a mask will perform in real life.

That’s because only some tests directly mimic the size of novel coronavirus particles, while others evaluate performance based on viruses like influenza. Researchers also still aren’t sure about the degree to which the virus gets transmitted via aerosols, since those tiny particles are extremely hard to trap and study without killing the virus.

Some scientists even have different ideas of what constitutes an aerosol – the generally accepted cutoff is less than 5 microns (that’s roughly the size of a dust particle) – and many experts think the delineation is arbitrary altogether.

Different studies also test masks under different circumstances: Some mimic the heavy air flow produced when a person coughs, while others mimic the air flow when a person is talking or breathing normally.

And of course, masks perform differently depending on how they’re worn. That’s why it’s better to stick with more protection over less.

This article was originally published by Business Insider.

Schlieren images of coughs with varying degrees of face covering. Credit: Padmanabha Prasanna Simha, Indian Space Research Organisation

Months into the COVID-19 pandemic, wearing a mask while out in public has become the recommended practice. However, many still question the effectiveness of this.

To allay these doubts, Padmanabha Prasanna Simha, from the Indian Space Research Organisation, and Prasanna Simha Mohan Rao, from the Sri Jayadeva Institute of Cardiovascular Sciences and Research, experimentally visualized the flow fields of coughs under various common mouth covering scenarios. They present their findings in the journal Physics of Fluids.

“If a person can reduce the extent of how much they contaminate the environment by mitigating the spread, it’s a far better situation for other healthy individuals who may enter places that have such contaminated areas,” Simha said.

Density and temperature are intricately related, and coughs tend to be warmer than their surrounding area. Tapping into this connection, Simha and Rao utilized a technique called schlieren imaging, which visualizes changes in density, to capture pictures of voluntary coughs from five test subjects. By tracking the motion of a cough over successive images, the team estimated the velocity and spread of the expelled droplets.

Unsurprisingly, they found N95 masks to be the most effective at reducing the horizontal spread of a cough. The N95 masks reduced a cough’s initial velocity by up to a factor of 10 and limit its spread to between 0.1 and 0.25 meters.

An uncovered cough, in contrast, can travel up to 3 meters, but even a simple disposable mask can bring this all the way down to 0.5 meters.

“Even if a mask does not filter out all the particles, if we can prevent clouds of such particles from traveling very far, it’s better than not doing anything,” said Simha. “In situations where sophisticated masks are not available, any mask is better than no mask at all for the in slowing the spread of infection.”

Some of the other comparisons, however, were striking.

For example, using an elbow to cover up a cough is typically considered a good alternative in a pinch, which is contradictory to what the pair found. Unless covered by a sleeve, a bare arm cannot form the proper seal against the nose necessary to obstruct airflow. A is then able to leak through any openings and propagate in many directions.

Simha and Rao hope their findings will put to rest the argument that regular cloth masks are ineffective, but they emphasize that masks must continue to be used in conjunction with social distancing.

“Adequate distancing is something that must not be ignored, since are not foolproof,” Simha said.

File photo of Georgia’s dimwitted Governor Brian Kemp on April 27, 2020.


File photo of Georgia’s dimwitted Governor Brian Kemp on April 27, 2020.
Photo: Kevin C. Cox (Getty Images)

Georgia Governor Brian Kemp signed an executive order on Wednesday banning all cities and counties in the state from requiring people to wear masks during the coronavirus pandemic. The move comes as Georgia has experienced a steep rise in covid-19 infections over the past two weeks, with 3,871 new cases and 37 new deaths on Wednesday alone.

Strangely, the governor’s new executive order encourages people to wear masks, which help slow the spread of the virus, but bans any local municipality from actually requiring that people wear them when they’re out in public. The order also specifically exempts Georgia schools from bans on large gatherings.

Governor Kemp, a Republican, has been slow to understand the most basic facts about the pandemic since it began, and infamously didn’t know that asymptomatic transmission of the virus was possible until April 1, long after it was common knowledge in the public health community. Kemp closed down some businesses at the time, but the state opened back up after just three weeks and Georgians are now paying the price.

In early April, Georgia had identified just 4,748 identified cases and 154 deaths from covid-19. Today, the state has recorded 127,834 cases and 3,091 deaths total, well below the actual number of cases and deaths according to health experts. The U.S. currently has the worst outbreak in the world with over 3.49 million cases and more than 137,000 deaths, according to the Johns Hopkins coronavirus tracker.

Even more bizarrely, Kemp is trying to position his latest executive order as a win for public health.

“Today I issued Executive Order 07.15.20.01, which extends the gatherings ban of more than 50 people, renews business restrictions, protects the medically fragile, and strongly encourages Georgians to wear masks in public,” Kemp wrote in a Facebook post. “To flatten the curve, I urge all local elected officials to enforce the terms of this order. Together, we will keep fighting #COVID19, weather this storm, and emerge stronger than ever.”

Even Walmart has more common sense than a simple “strong encouragement” that everyone wear masks. The company announced on Wednesday that it would require all customers across the country to wear masks in an effort to keep both its workers and the general public safe during the pandemic. Walmart is even going to deploy what it calls “health ambassadors” in black polo shirts at the front of every store to enforce the mask requirement starting on Monday, July 20. The company didn’t use the term “mask bouncer,” but that’s precisely what they will be.

Kemp isn’t the only governor in the U.S. showing off his idiocy this week. Oklahoma Governor Kevin Stitt announced on Wednesday that he’s tested positive for covid-19. Stitt said he was feeling fine but had been achy the day before and he only got the diagnosis because he’s tested routinely.

Governor Stitt famously attended President Donald Trump’s neo-fascist rally in Tulsa, Oklahoma without wearing a mask on June 20. Public health experts believe that rally was a major source of infection in the region, but it’s not clear whether Stitt was infected there or if he contracted the virus someplace else.

Oklahoma Governor Kevin Stitt at President Donald Trump’s June 20, 2020 rally in Tulsa.


Oklahoma Governor Kevin Stitt at President Donald Trump’s June 20, 2020 rally in Tulsa.
Photo: Nicholas Kamm (Getty Images)

For all we know, Stitt could’ve been infected while going out to eat, something that he encouraged Oklahomans to do in mid-March while posting (and then deleting) a tweet of his family at a packed restaurant. One restaurant in Tulsa where Stitt dined last week has closed its doors temporarily yesterday after the governor made his covid diagnosis public.

Unsurprisingly, more people are being hospitalized across the country for covid-19, with Miami, Florida running out of ICU beds, Alabama hospitals running at near capacity with only 12% of the entire states’s ICU beds available, and doctors in Houston, Texas warning there’s “no end in sight” to the ICU shortage.

Georgia saw 417 new patients admitted to the hospital for the virus yesterday, bringing the number of people currently hospitalized with covid-19 in the state to 14,102. And if local governments aren’t able to require that people wear masks it’s only going to get worse out there.

Your government has failed you. There are plenty of anti-mask idiots in the world, even in countries like Taiwan and Hong Kong, but their respective governments haven’t simply given up on fixing the problem like the Trump regime apparently has.

“Personal responsibility” and wearing a mask may not pull the U.S. completely out of the pandemic—since every other country that suppressed the virus employed many other tools only available to governments—but masks are the only tool the average American has left.

Stay safe, friends. Or as safe as anyone can be during an uncontrolled pandemic.

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