In what has become an unprecedented time for companies and their employees, adjusting to a “new normal” of working away from the office has been challenging for many as the COVID-19 pandemic continues. As companies begin to look ahead and plan for a return to some normalcy, continuing to practice safe social distancing measures in the workplace will be key to providing a safe and efficient workplace environment. This includes continuing to keep a 6-foot space between individuals and the use of Personal Protective Equipment (PPE) such as face masks. Differentiating between the types of masks and the protection they provide is important for companies to know before bringing employees back into the office.
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What Are the Most Effective Face Masks to Use?
Two of the primary masks in use during the COVID-19 pandemic have been the N95 mask and the KN95 mask. But what is the primary difference between these two masks? First off, let’s define what an N95 mask is: according to the FDA, a N95 respirator is “a respiratory protective device designed to achieve a very close facial fit and very efficient filtration of airborne particles.” The edges of the respirator mask are designed to form a seal around the wearer’s nose and mouth.
KN95 masks are face masks that meet the requirements of China GB standards. The “standard” this refers to a filtration efficiency of more than 95% for non-oily particles that are greater than 0.3 microns in size. The N95 masks require the same standard for filtration efficiency. For all intents and purposes, the masks are able to perform the same functions. The U.S. Centers for Disease Control (CDC) says KN95 masks are as effective as N95 masks and are one of the many "suitable substitutes" for N95 masks that are in short supply. In short, KN95 and N95 masks both offer 95% protection from airborne particles and the same level of filtration.
What are the Differences Between N95 and KN95 Masks?
Although both the KN95 mask and N95 mask share some similarities, there are some minor distinctions between the two masks. Since the COVID-19 outbreak, N95 masks have been largely reserved for medical personnel, first responders, and those who have been battling the disease on the front lines. One of the reasons for this is N95 masks are considered to have slightly stronger requirements for breathability under the US Code of Federal Regulations for N95 masks. KN95 masks, on the other hand, are largely considered to be better suited for commercial and personal use. In addition to having similar functions as the N95 mask, they are also more readily available and therefore easier to access for those not working directly to combat the virus.
This chart from 3M highlights more specific differences between the two masks, in addition to showing statistics of masks that have been in use in countries such as Korea (1st Class) and Japan (DS FFRs).
N95 vs. KN95 Comparison Chart
As you can see, both the N95 and KN95 masks share similar attributes in the primary measures of mask efficiency such Flow Rate and Filter Performance percentage. However, there are some slight differences between the masks that are made evident on the chart as well. The inhalation resistance is slightly higher for the KN95 mask, as is the exhalation resistance. This chart also shows how different standards of measurements were used in determining if the masks were able to meet their countries’ specific requirements. For instance, unlike the K95 mask, the N95 mask was not required to meet a CO2 clearance requirement. Manufacturers were not required to run fit tests for leakage on N95 masks, but the Chinese government did require manufacturers to run mask fit tests on KN95 masks, ensuring the masks had equal to or less than 8% leakage in order to be certified.
Surgical and Cloth Masks
In addition to KN95 masks and N95 masks, surgical and basic cloth masks are common to see out in public. Unlike N95 and KN95 masks, surgical masks and cloth masks do not act as respirators and do not provide quite as much protection. Surgical masks are still useful to help filter out large particles in the air and they also may protect others by reducing exposure to the saliva and respiratory secretions of the mask wearer. Similar to surgical masks, cloth masks provide some level of barrier between air particles and your mouth and nose. Although they cannot provide the same level of protection as N95 and K95 masks, cloth masks are more accessible and reusable. Cloth masks also remind wearers not to touch their nose or mouth.
Winvale and PPE
Realizing the need to help provide PPE during the COVID-19 outbreak, Winvale is excited to announce a new partnership with MediDent Supplies (a subsidiary of No Borders, Inc.) to provide Personal Protective Equipment (PPE) to the federal government, state and local governments, and commercial business use. This includes both KN95 respirator masks and medical face masks for healthcare professionals and the first responder community through Winvale’s GSA Schedule contract. These face masks are also available for both commercial and public use, with the ultimate goal to help companies create a safer space for their employees both in and out of the workplace.
Moving Forward
Here’s what to do to level up your mask-wearing game.
Make sure it’s comfortable. Whatever mask you choose, make sure it’s something that you can comfortably wear on a regular basis. “I could create the best mask in the world, but if it’s super-uncomfortable, people just aren’t going to wear it,” says A.J. Prussin, PhD, a research scientist in the department of civil and environmental engineering at Virginia Tech in Blacksburg.
Understand the types. By now, N95 and KN95 are household names. But knowing the differences between them can help as you’re considering how to upgrade your mask.
An N95 respirator, as it’s technically called, gets that designation based on requirements from the National Institute for Occupational Safety and Health for performance and manufacturing. It must filter out at least 95 percent of very small particles. The N95 is intended as a workplace mask, so the NIOSH standards are meant to ensure that it provides adequate protection on the job. To maintain that certification, regular quality control is required, says Anne Miller, executive director of Project N95, a nonprofit organization that sources high-quality and reliable masks and other personal protective equipment (PPE) for healthcare workers and the general public.
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Other types of respirators, such as the KN95 (from China), are subject to their country’s standards for performance. Like N95s, KN95s must be able to filter out 95 percent of small particles. But they’re not regulated as heavily as N95s, Miller says, requiring a one-time certification rather than ongoing scrutiny. And according to the CDC, about 60 percent of KN95s that NIOSH evaluated during and didn’t meet the standards they were claimed to.
Still, if you can confirm they’re authentic (see tips below), they or similarly high-performing masks (such as Korean KF94s) will provide some of the highest levels of protection, Prussin says.
And remember, you can also seek out other types of devices that provide equivalent or better protection than an N95. One good option, Jimenez says, is an elastomeric respirator. Its appearance might seem like something out of a sci-fi series, but these devices, some of which are also regulated by NIOSH and can be used as PPE in the workplace, can be highly effective, particularly because they may be easier to fit properly. A small study published in March in JAMA Network Open found that when performing mock CPR, a strenuous activity that requires a lot of movement, elastomeric respirators leaked less and provided better protection for healthcare workers than N95s.
A major bonus: Unlike disposable medical masks, elastomeric respirators can be cleaned and reused. If you opt for one, however, just make sure it doesn’t have a filterless exhale valve, which would allow your unfiltered breath to escape, potentially endangering others if you’re infected.
Double up. Better than any cloth mask or surgical mask on its own, Prussin says, is a tight-fitting cloth mask layered over a surgical mask. He recommends looking for a surgical mask that meets ASTM standards, which should provide a minimum level of filtration. (More on this below.)
Get a good fit. Although many cloth masks don’t perform as well as medical masks, upgrading your mask is about more than just the material it’s made out of. A well-fitting cloth mask made from at least three layers of tightly woven cloth (with the middle layer being a different type of fabric), would probably outperform a surgical mask that has gaps on the sides and is constantly sliding down off your nose, Jimenez says.
That’s because air takes the path of least resistance. “Any gap between the face and the mask defeats the purpose, because the air has a much easier time going through those gaps instead of going through the cloth of the mask,” Jimenez says. This is a potential problem even with highly effective but ill-fitting N95, KN95, and KF94 respirators.
There are a number of strategies you can use to get a better fit, such as double masking, using a mask brace or fitter, or strategically knotting ear loops. For more on how to make your mask fit better, see our guide here.
Different face shapes and sizes may be suited to different types of masks. If you buy one type of mask and find that it doesn’t fit and that you can’t adapt it well enough to close the gaps—or you just find it to be uncomfortable and difficult to wear—don’t give up. Try another brand or style.
Shop smart. It’s a good idea to look for ASTM standards not just when you’re buying a cloth mask but also when you’re buying a surgical mask. Surgical mask makers can make products that meet ASTM standards for the material used, which guarantees certain levels of filtration and breathability. (These are different standards from those used to evaluate cloth and nonmedical masks.) Look for masks that are labeled ASTM Level 1, 2, or 3. You’ll still need to make sure the mask fits well to your face, however, because the certification applies only to the mask’s filter material and not its overall performance.
Counterfeit KN95 or equivalent face coverings, or products that don’t meet U.S. or international standards, have been a problem during the pandemic. But reliable sources for masks and respirators exist, including this list of products tested by the National Personal Protective Technology Laboratory. Project N95 is another resource. And although the FDA revoked its blanket emergency use authorizations for various types of personal protective equipment in , the list of products that received the authorizations is also a good place to look, Miller says.
If you find a product on a site like Amazon and you’re not sure it’s authentic, CR’s Dickerson recommends that instead of putting it right into your cart, try searching for the brand name’s stand-alone site. Look for what’s said about the testing it has done and the standards it has met. Be wary of a site that offers little evidence about the effectiveness of its masks. Another good practice is to make sure you’re buying either directly from a manufacturer or directly from an authorized seller for a product, such as that brand’s official Amazon or eBay store.
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