The research
- Why you should trust us
- What is a medical-style mask, and do you need one?
- Our favorite respirator masks
- Our favorite surgical-style masks
- How we picked and tested
- Another medical-style mask we like
- More NIOSH-approved, NIOSH-assessed, or FDA-authorized masks worth considering
- More masks (that aren’t FDA-authorized or NIOSH-approved)
- Sources
Why you should trust us
I spent months scrolling through scores of masks online, poring over documents from the CDC’s National Institute for Occupational Safety and Health (NIOSH) and the FDA, and puzzling over little certification slips half-written in Chinese (a childhood’s worth of Saturday morning Chinese school did not help).
I ultimately tracked down legitimate respirators and masks, as well as reliable retailers that sell them. I sent those masks to a panel of Wirecutter staffers with different face shapes, and collected their feedback on fit and comfort. Besides consulting five scientists, I’ve interviewed five manufacturers, three importers, two retailers, an e-commerce expert, and two government agencies. In all, I’ve assessed 25 respirators and 14 surgical-style masks.
What is a medical-style mask, and do you need one?
The term “medical-style mask” refers to the types of masks you typically see in health-care settings. These include respirators, such as those labeled N95 (designed to meet US standards), KN95 (Chinese standards), KF94 (Korean standards), and FFP2 (European standards), as well as surgical masks — the pleated variety with ear loops or ties that typically come in boxes of 50 or so. Consisting of high-efficiency filter layers, all of these mask types are designed to protect the wearer in high-risk situations.
For the best protection against airborne respiratory pathogens, you may consider wearing either a respirator mask or a surgical mask modified to form a better seal or layered under a well-fitting cloth mask. In fact, a CDC paper reported that securing a surgical mask to the face (by knotting the ear loops and tucking in the sides, as shown in this video, or by adding a well-fitting cloth face mask over it) can potentially decrease your exposure to possibly infectious tiny airborne droplets called aerosols by about 95%, which is also about how well respirators are expected to perform.
This level of filtration is better than what you can get from almost all masks made from only cloth, said Linsey Marr, a professor of engineering at Virginia Tech who is an expert in the science of aerosols. In fact, when Wirecutter commissioned cloth-mask filtration-efficiency testing, filter-less, double-layer cloth masks filtered (at a flow rate similar to what happens with normal talking volume) around 47% of 0.5-micron particles at best. (Those with incorporated filters, however, such as the Enro Tech and Happy Masks Pro, filtered similarly to N95s, though machine washing and drying diminished their efficacy.)
N95 vs. KN95, KF94, FFP2, and surgical masks
Constructed with multiple layers of nonwoven fabric, an N95 respirator blocks out at least 95% of particles as small as 0.1 micron in diameter. Surgical N95 respirators offer the added benefit of also having passed tests for such factors as fluid resistance, biocompatibility, and flammability. All legitimate N95 masks are approved by NIOSH as respirators; surgical N95 models have undergone additional NIOSH testing to meet specific FDA requirements.
N95 masks fasten snugly to your face with two bands that go around the back of your head. As with cloth face masks, some people find bands to be easier to adjust than ear loops — you can play around with knots and positioning to create a good seal. However, an N95’s elastics tend to be tighter than those on cloth masks, which helps with the seal but may be uncomfortable. Some N95 masks, like Wirecutter’s picks for dealing with smoke and dust, have valves for easier exhalation, but because they let unfiltered air escape, they are not useful in preventing the spread of communicable respiratory diseases.
KN95 masks (China’s N95 equivalent) should block out 95% of 0.3-micron particles; KF94 and FFP2, 94%. All are made with similar layers of high-filtration, nonwoven materials. KN95, KF94, and FFP2 are internationally sourced respirators and therefore don’t undergo the NIOSH approval process. Early in the pandemic, with N95 respirators in short supply, some of these masks — if they met certain criteria — were FDA-cleared for workers in health-care settings under an emergency use authorization (EUA). That authorization has since been revoked (PDF) due to a replenished supply of N95s, but the FDA suggests that these previously authorized respirators (such as our pick from Powecom) be redistributed for use in nonmedical settings.
Unlike N95 masks, these other respirator masks typically have ear loops instead of headbands. People often encounter good filtration but a bad fit when shopping for a KN95. The same goes for N95 masks that aren’t customized (as they typically would be in a hospital setting). A January 2021 PLOS One article on mask-fit issues reported that a KN95 was a poor fit for all seven study participants, while the five N95 masks in the experiment did little better — failing to fit four out of seven subjects. Even a bit of extra fat in the chin or a few millimeters in the width of the nose can have an impact on a respirator’s fit, the authors noted.
Loretta Fernandez, PhD, associate professor of civil and environmental engineering at Northeastern University, found that a poorly fitting KN95 may block 0.3-micron particles only as effectively as a poorly fitting surgical mask — at around 72% efficiency instead of the promised 95%-plus. This level of performance may be problematic for people working in the ICU but perhaps less outside of a medical context. Still, from an economic perspective, it’s pointless to spend the extra money on a KN95 only to have it work as effectively as a much cheaper mask. Fernandez, who has been assessing masks (PDF) since the start of the pandemic, noted an easy fix that a dentist shared with her: By cutting the ear loops on a KN95 mask and reattaching them to form headbands, the dentist was able to achieve a secure enough fit to nudge the filtration back up past 90%.
Surgical masks are medical devices regulated by the FDA. These masks are designed to prevent fluid from penetrating the mask (from, say, splattering as a result of a medical procedure) and potentially harming the wearer. Because they don’t fit close to the face, they’re not designed to protect the wearer from inhaling small, potentially infectious particles. Nevertheless, in order to gain FDA clearance, either through 510(k) or the agency’s emergency use authorization, surgical masks undergo testing to meet voluntary consensus standards set by ASTM International (formerly the American Society for Testing and Materials) — and those standards include achieving a level of filtration efficiency. Level 1 indicates that the mask blocks out 95% of particles at 0.1 to 5 microns in diameter at certain flow rates following another set of challenges. Levels 2 and 3 indicate at least 98% for the same particle-size range.
Regardless of which type of mask you manage to get your hands on, however, you won’t come anywhere close to the stated filtration values in real life unless you secure a perfect seal to your face around the entire perimeter of the mask. “Generally speaking, if you’re fogging up your glasses, it’s not a perfect seal,” said Hana Akselrod, assistant professor of medicine in the division of infectious diseases at George Washington University School of Medicine. (If you don’t wear glasses, take a big exhale with your mask on — if you feel a puff of air on your skin near the edges of the mask, you need a tighter fit.)
Our favorite respirator masks
Kimberly-Clark N95 Pouch Respirator
What we like: This duckbill-shaped mask is a NIOSH-approved N95 respirator manufactured in the US. It’s also our favorite because it’s the only one of its type that actually fit our testers well, and it felt surprisingly comfortable. Thanks to its soft, flexible construction, the Kimberly-Clark N95 Pouch Respirator should fit most people. Because it’s a nonmedical respirator, this mask is not tested to protect you from potential splatter of bodily fluids.
Soft headbands that easily knot and stretch over various positions on the head form a good seal and are plenty comfortable for long-term wear. A more cavernous cut (about an inch wider on each side compared with the typical respirator) means more filtered air to breathe in. In our experience, a long, sturdy nose-bridge wire helped minimize glasses fogging, too. I was able to place the lower band higher on my head to prevent air from escaping around my chin (a pain point for me with other respirators). This mask doesn’t feel the easiest to breathe through — but that suggests some degree of filtration efficiency. (“I’m always suspicious of masks that have little or no breathing resistance to them,” said Christian L’Orange, the assistant research professor of mechanical engineering who ran our face mask filtration tests at Colorado State University.) The Kimberly-Clark mask closes absolutely flat without the need for you to pinch the nose wire closed, as you have to with many other foldable masks, and at around $1 a mask, it’s also the least expensive NIOSH-approved N95 we recommend.
What we don’t like: This mask looks ridiculous. “Our initial focus was offering performance and comfort over form,” said Rob Hughes, vice president of PPE at Kimberly-Clark Professional. He added that the company is currently evaluating additional designs. Note, too, that this mask is truly for one-time use: With too much wear and tear or rough usage, the bands can rip, and the nose-bridge wire on top can become unstuck.
WellBefore WB-N-200 N95 Respirator Mask (flat fold)
What we like: Many NIOSH-approved N95s and headband-style KN95s we’ve tried were either too large or too tight. The sturdily constructed, flat fold WellBefore WB-N-200 N95 Respirator Mask also felt large on some of our panelists, but a bit less so. More importantly, it doesn’t feel suffocating despite creating a good seal. This is partly due to the plastic brackets on either side of the mask, which allow you to tighten the headbands as necessary. But it’s also thanks to the ample clearance the mask allows over the nose and mouth, which offers plenty of room for filtered air to circulate. A foam strip over the nose-bridge wire provides some cushioning.
What we don’t like: “This is a lot of mask,” several testers commented, noting the WellBefore’s plastic and foam features, wide headbands, and girth. This mask is also more than twice the price of our other respirator picks, the lighter but odd-looking Kimberly-Clark N95 and the easy-on, easy-off but less-adjustable Powecom KN95. These respirators, sold in packages of five or more, also come individually wrapped (which some people may find beneficial for tossing in a bag or glove box, though others may find it unnecessary).
Powecom KN95 Respirator Mask
What we like: This formerly FDA-emergency-authorized KN95 mask offers some variety — you can choose from ear loops or headbands, and multiple color options. We bought Powecom masks directly from the importer and distributor, Bona Fide Masks, which remains the exclusive distributor of Powecom KN95 respirator masks in the US and Canada.
Powecom’s KN95 was FDA-cleared under the agency’s emergency use authorization during the N95 shortage. When Chinese authorities updated the KN95 standard, we commissioned Colorado State University’s Center for Energy Development and Health to verify that the Powecom mask sold by Bona Fide Masks maintained its high filtration efficiency. And it did: With a perfect seal, the mask offered more than 99% filtration efficiency for 0.5-micron-diameter particles drawn through a chamber at a rate of 15 liters per minute (similar to the rate that a person would exhale when talking at normal volume). We like that the mask’s fasteners are sturdily attached (more so than most) and that they knot easily for adjustment. Slightly rounded, as opposed to flat, they’re somewhat gentler on the ears, too. We also like that you can choose to buy as few as 10 masks in a pack (though you can order as many as 10,000). The dimensions were neither too large nor too small for most of our testers, yet the mask also accommodated one tester who has a beard (though, of course, facial hair inherently lessens a mask’s seal).
What we don’t like: As some readers have pointed out, the Powecom design’s ear-loop elastics can feel uncomfortably snug. If that’s the case for you, try gently pulling on them to loosen them up a bit before wearing the mask. People with smaller faces may have the opposite issue, at least with the ear-loops version of this mask: The straps may be too loose to create a close fit. But that has been the case with almost all the medical-style masks we’ve tried. Knotting the ear loops helped me block the air from escaping at my chin but somehow increased the fog on my glasses. In contrast, headbands provide a snugger fit, though one tester found that the headband version of this mask was too tight for comfort (and strongly preferred the ear-loops version).
Our favorite surgical-style masks
Surgical masks are less expensive and less thick than N95 designs and other respirators, but because they tend to gape at the sides, they require some adjustments for optimal protection. As the CDC recommends, you can knot the ear loops and tuck the sides (this CDC video shows you how) or add an adjustable cloth face mask (like one of our picks) on top. You can also do both. We tried 14 surgical-style masks, and for the most part, the differences were barely discernible.
DemeTech DemeMask Surgical Mask
What we like: Most disposable pleated masks feel and function about the same, but the DemeTech DemeMask Surgical Mask is FDA 510(k)-cleared and meets ASTM Level 3 standards, as it’s capable of blocking 98% of particles as small as 0.1 micron (assuming a good seal). We like its exceptionally soft ear loops, which feel knitted and don’t dig into the ears as most other elastics do. The loops are also firmly attached, so when you’re putting this surgical mask on or taking it off, the fasteners are less likely to pop off (as we’ve found with some cheaper models). With its soft edges, the DemeMask is easy to knot at the ear loops and tuck at the sides (video) for a secure fit. We also like that it comes in a small size, which might work for some bigger kids, and in a tie version, which may be especially helpful for people who wear hearing aids.
What we don’t like: The DemeMask is costlier than most pleated masks you can find online or in a drugstore, though its price is roughly in line with that of masks offering similar filtration credentials, such as the CVS Health Surgical Face Mask. A pack of 10 typically costs $7.50.
Medline ASTM Level 1 Procedure Face Mask with Ear Loops
What we like: This box of 50 is available for the best price we’ve seen so far for an FDA-cleared surgical mask (roughly 21 cents per mask). As its name indicates, the Medline ASTM Level 1 Procedure Face Mask with Ear Loops meets ASTM Level 1 standards, which means it blocks at least 95% of particles measuring 0.1 micron in diameter or larger. That’s 3% less than the Level 3 DemeTech masks can block, but unless you’re a health-care provider in a high-risk medical setting, that’s not much of a difference. Medline makes its own masks but also partners with other FDA-cleared manufacturers to avoid stock shortages, a company spokesperson told us. The Medline mask’s ear loops are slightly larger than those on the DemeTech mask (and most other surgical-type masks we’ve seen); this allows them to stretch over wider faces with less tension on the ears. The extra length of elastic also means you can easily seal side gaps by knotting the ear loops and tucking in the sides (video).
What we don’t like: Except for their larger ear loops and FDA clearance, the Medline masks are fairly run-of-the-mill. Their inner lining isn’t particularly tissue-like as with others we tried, nor are the ear-loop elastics as soft or firmly attached as those on the DemeTech mask.
How we picked and tested

Searching for a reliable respirator or surgical mask at a decent price, particularly early in the pandemic, has been the most difficult shopping experience I’ve ever had. For a while, it was like trying to find the last Lego Star Wars Advent calendar three weeks before Christmas — but infinitely worse. Aside from navigating retailers that were sold out (or were price-gouging), I also dealt with fraudulent sellers, fraudulent products, or both: The CDC in 2022 reported that about 60% of KN95 masks sold in the US at that time were fake.
Years later, the shortages have eased up, but that doesn’t make finding the right mask easy, particularly when it comes to KN95 respirator masks. Yes, there’s the counterfeit issue. But also, KN95 and surgical masks don’t always fit very well. As Loretta Fernandez, an associate professor of civil and environmental engineering at Northeastern University in Boston, explained, “There’s nothing magical about a KN95. The edges still need to form a good seal against the face for it to be protective.” The truth is, any medical-style mask — no matter how superior the filtration — doesn’t do much better than a quality cloth mask if it allows most of the air you’re breathing to go around it rather than through it. Proper fit is critical.
As for disposable pleated masks, every neighborhood store and online vendor seems to sell them, but not all of them are actually surgical masks — just surgical-style, which is why they’re often a third or half the price of actual authorized surgical masks. The packaging on most simply says “face mask,” in which case you can’t expect the masks to filter like the kinds of masks that health-care workers wear in hospitals. In fact, Colorado State University’s Christian L’Orange — who has tested thousands of face masks, including our picks — told us that the most egregious fails have come from surgical-style face masks as opposed to respirators. Some have exhibited a mere 20% filtration rate on small particles (about the same as many of the filterless cotton masks we tested for our guide to cloth face masks), though most of them have demonstrated a slightly less shocking 70% to 80% rate. Others have appeared to be missing layers altogether, he said. One way to detect a fake is to hold it top side up under a dripping faucet: If the droplets soak in instead of completely beading up, it’s not a real surgical mask, which by definition should have some level of water resistance.
When shopping for a medical-style mask, Virginia Tech’s Linsey Marr suggested buying directly from a reputable supplier whenever possible, not just grabbing whatever you find from a third-party seller (the fewer middlemen, the smaller the chance of mischief). Beyond verifying retailer and mask legitimacy, we also confirmed that each respirator or surgical mask we considered has been included in at least one of the following:
- NIOSH’s list of approved N95 respirators.
- The FDA’s Personal Protective Equipment EUAs (emergency use authorizations) Appendix A — a list of surgical masks and respirator manufacturers, indicating that the manufacturer submitted test reports demonstrating that the product met certain performance standards, including filtration efficiency, and that the FDA recognized it.
- The FDA’s 510(k) clearance database.
- NIOSH’s International Respirator Assessments, which include US-sold, foreign-made respirators only; we look for good results on these tests. Although these tests aren’t the same as NIOSH approval, they do give mask buyers a sense of the quality of the materials used.
Sometimes cross-checking wasn’t possible until we received the masks and found the product qualification certificate — the small slip of paper in the packaging that includes the details about the product and its manufacturer. We also reached out to some of the manufacturers or the sellers to understand the vetting or manufacturing process, especially if we couldn’t find the manufacturing company on any of the above lists.
For masks sold on Amazon, we confirmed with the manufacturer that we had a legit link to the product being sold. Although this factor limits your choices perhaps unnecessarily, as Kathy Cummins, head of marketing and analytics at Hinge Global, pointed out, we like the assurance that a specific inventory of the product has been vetted by the retailer. A caveat: The “same” mask sold by the same company can differ depending on the retailer. For instance, masks manufactured by the Chinese company Winner Medical that we bought on Amazon consisted of thinner, less-soft mask material than we found on the Winner Medical masks once sold by CVS, despite their having the same product name (“Medical Face Mask”), standard certification (ASTM Level 1), and listed materials (“non-woven 66%; melt blown, 34%”) on the certification slips. Winner Medical confirmed to us that it designs masks according to a retail client’s specifications while still ensuring the same protective effects.
We then assessed each mask in terms of fit and comfort — something far too individual for anyone to judge in a general sense. Still, we’re doing our best by distributing masks to a diverse group of nine panelists (two of whom are my husband and me).
When we’ve come across masks that fit and feel great but aren’t NIOSH-approved or FDA-cleared, we’ve sent samples to Colorado State University’s Center for Energy Development and Health for filtration efficiency and breathability testing.
Another medical-style mask we like
Kyungin Flax KF94
Because of KF94 masks’ more structured “boat” shape (a horizontal rectangle that tents up to secure itself over the nose bridge and chin), they’re somewhat harder to adjust, and our panelists had different opinions on which fit best. But if you’d like to try one, the Kyungin Flax KF94 is one of the more affordable models we’ve tried. Like most KF94s, which didn’t arrive in the US until later in the pandemic, the Kyungin Flax mask was never FDA-cleared for emergency use for medical workers. So, in collaboration with Colorado State, we filtration-tested the mask ourselves — and found it to block 99% of particles as small as 0.5 micron.
Overall, most KF94s feel thinner than the N95s and KN95s we tried (except for the Kimberly-Clark mask we recommend and the 4CAir AireTrust Nano Mask we also like), and their boat-like shape provides arguably more-reliable clearance over the nose and mouth. The Kyungin Flax is no different. However, this mask comes in only one (rather large) size — which made it harder for some of our panelists to achieve a solid seal. If you prefer a KF94 mask and have a narrower chin or smaller face, you might have better luck with masks from Dr. Puri or Blue. Wearing the mask on a cold winter day, we’ve also noticed it collecting more condensation at the inner layer than our picks.
More NIOSH-approved, NIOSH-assessed, or FDA-authorized masks worth considering
More masks (that aren’t FDA-authorized or NIOSH-approved)
Sources
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Hana Akselrod, MD, assistant professor of medicine in the division of infectious diseases, George Washington University School of Medicine, phone interview, February 23, 2021
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Kathy Cummins, head of marketing and overseer of research and data analytics, Hinge Global, phone interview, February 24, 2021
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Loretta Fernandez, PhD, associate professor of civil and environmental engineering at Northeastern University, phone interview, February 23, 2021
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Christian L’Orange, PhD, associate director of the Center for Energy Development and Health, and assistant professor of research in mechanical engineering, Colorado State University, phone interview, February 3, 2021
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Linsey Marr, PhD, professor of civil and environmental engineering, Virginia Tech, email interview, February 9, 2021
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Nikki McCullough, PhD, global technical services and regulatory director, 3M Personal Safety Division, phone interview, January 19, 2021
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Bryan Ormond, PhD, assistant professor of textile engineering, Textile Protection and Comfort Center, Wilson College of Textiles, North Carolina State University, phone interview, June 12, 2020
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Kristen Picard, product marketing director, Honeywell, phone interview, February 11, 2021
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Chris Plotz, director of education and technical affairs, INDA (Association of the Nonwoven Fabrics Industry), phone interview, March 2, 2021
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Nura Sadeghpour, health communications specialist, CDC/NIOSH, email interview, February 24, 2021
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Ron Shaffer, PhD, former research branch chief, National Personal Protective Technology Laboratory, NIOSH, phone interview, June 29, 2020
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Shirley Simson, press officer, FDA, email interview, February 24, 2021