Importance of fit testing KF94 masks

How to ensure a good fit for your masks.

As the winter season approaches and flu season looming wearing a mask is a great way to add extra caution to our daily lives. Among various masking options KF94 masks have become a popular choice for their efficient filtration capabilities as well as availability. However, simply wearing a KF94 mask is not enough to ensure complete safety. A proper fit is crucial when it comes to the efficiency of the mask. In this blog we will go over the importance of fit testing and how to do it at home.

Why Fit Testing Matters:

KF94 masks, like their N95 counterparts, rely on a tight seal against your face to provide the best protection. If there are any gaps or leaks around the mask’s edges, then airborne particles such as viruses and other pollutants can easily enter and compromise your safety. Fit testing ensures a snug fit for your face and reduces the chance of any leaks.

How to perform a fit test:

Typically, there are two types of fit tests a qualitative fit test and a quantitative fit test. Both tests are used in the professional field in high-risk environments such as hospitals. As fit testing is important to ensure complete protection that is required in the healthcare setting, specialized equipment is used. However, there are still ways to fit test to ensure a tight fit for your masks at home.

  1. Put on the KF94 mask according to the manufacturer’s instructions.
  2. Check to see if there are any gaps between your mask and face. Mold the nose bridge to ensure a tight seal.
  3. Make sure the mask reaches past the tip of your chin.
  4. Open your mouth to simulate talking and ensure the mask doesn’t slip off your chin.
  5. Adjust and tighten the ear loops if needed to get a tighter fit.

If the mask seems to be slipping off your chin, then you may need to get a size up as the mask may be too small. Conversely if there are gaps between the mask and your face, then you may need a size smaller.


Fit testing a KF94 mask is a crucial step to ensure your safety and efficacy of the mask. Even without specialized tools and equipment, a simple fit test to ensure the mask is the right fit for you can elevate the protection provided by the KF94 mask. By having a well fitted KF94 mask you not only protect yourself but also contribute to the collective effort to mitigate spread of respiratory diseases.

The cookie settings on this website are set to 'allow all cookies' to give you the very best experience. Please click Accept Cookies to continue to use the site.
You have successfully subscribed!
This email has been registered