Oh the great debate between the KN95 vs N95 mask this topic is raging right now and we hope our article can provide a great reference. With the ongoing pandemic, different types of masks have surfaced: homemade cloth masks, surgical masks, and N95 Respirators. These masks differ in filtration, which is what protects the wearer and those around them. Among these three, the mask that filters out the most particles (95 percent of small particles!) is the N95 respirators. There are two commonly available types: the N95 and the KN95; both masks are made for the fight against the spread of respiratory droplets that may contain infectious particles. N95 is perfectly made for healthcare professionals, while KN95 is fit for the general public.
What are N95 masks?
The N95 Mask adheres to US NIOSH standards which requires headbands not ear loops like a KN95. Healthcare professionals are at a higher risk of infection during surgery or when tending to the COVID-19 ward, which is why the medical front liners are the primary users of the N95 masks before and during the pandemic. Because these masks have strict regulations on the pressure drop that is caused by breathing inside the masks, as well as the seal around the nose and mouth, or what we call the “fit restriction”. Most N95 masks come in multiple sizes and are custom fitted to the user. These fit test are performed by the institution who will use them not the government. After all, doctors and nurses will have to wear these masks in sterile environments to treat patients and keep themselves safe, for hours and hours.
What are KN95 masks?
KN95 Respirators can adhere to different international standards GB2626-2006 or EN149-2001(FFP2). The main difference between these standards is FFP2 requires filtering of 95% oily particles. These standards are comparable to US NIOSH standards with two exceptions NIOSH does not test filtering of oily particles, and requires very uncomfortable headbands. The KN95 uses comfortable ear loops and can achieve the same filtering and similar leak requirements of <8%.
On the other hand, before the pandemic, the primary users of the KN95 masks are those in chemical manufacturing. KN95 masks are also used in laboratories and hospitals around the world under the GB2626-2006 standard. Where workers are exposed to toxic chemicals but run a lower risk of actually getting in contact with liquid, so if these masks are able to lessen the impact of the fumes from chemical agents, they can definitely help with the prevention of the spread of the virus. KN95 masks have lesser restrictions on the pressure drop and fit restrictions for wearers since they are expected not to come in close contact with dangerous substances. In short, due to the broader international restrictions on the KN95 mask, it is more comfortable without sacrificing the primary purpose of the masks.
The main differences of N95 and KN95 masks.
In terms of purpose and safety, N95s and KN95s are not different at all. Both filter 95 percent of small particles, and both have the same flow rate in inhalation and exhalation. The only difference is in the pressure drop and fit restrictions, which primarily concern the user’s comfort. The higher the pressure drop, the higher the airflow, the easier it is to breathe. Underneath is a table that offers the accurate numbers of each mask for pressure during inhalation and exhalation, thus KN95’s are easier to breath through and provide similar the same filtering protection.
| N95 | KN95 | |
| Inhalation resistance – max pressure drop | ≤ 343 Pa | ≤ 350 Pa |
| Exhalation resistance – max pressure drop | ≤ 245 Pa | ≤ 250 Pa |
We highly recommend the KN95 Mask as a ethical choice for protecting yourself. Not only will you be helping front line responders buy not limiting their supply of N95’s, but we will also donate one mask to them for every one purchased. Choosing which mask to purchase is a concern for all. Living in this new normal requires everyone to be cautious in all of our actions, which can include things as simple as grocery shopping or walking the dog. Information is vital in making decisions regarding our safety, and it is our responsibility to contribute to the prevention of the spreading of COVID-19.