Ann Arbor, MI, Sept. 21, 2020 (GLOBE NEWSWIRE) -- NSF International is helping consumers choose the most suitable face mask to help prevent the spread of infectious diseases like COVID-19. Do your part - use the “Three Fs” to choose the best mask for you:

  • FIT: Masks should fit snugly and cover your mouth and nose, with no gaps or openings. If you feel air coming in from the sides/top/bottom when you breathe, adjust the fit to close the gaps.
  • FIBER: Natural fibers like cotton or wool have rougher threads and are better than paper or synthetics at trapping water droplets that carry disease. Look for masks with at least two layers; some masks have a pocket for an extra layer of fabric, paper towel, or even a coffee filter.
  • FLOW: You should be able to breathe comfortably through your mask. If breathing is difficult because the mask is too heavy or for health reasons (asthma, etc.), choose a lighter mask you can wear as long as possible. A lighter mask is better than no mask at all.

NSF International is a global public health organization, with more than 75 years of experience protecting the water we drink, the food we eat, the air we breathe and the environment we share. Learn more at

Source: Kim Trautman, Executive Vice President, Medical Device International Services, NSF International

Editors’ Note: NSF International provides the attached image for use on your websites, social media, etc. To speak to Kim Trautman, or any of our public health experts, please contact Ken Bearden at or +1.734.769.5167.

NSF International is an independent, global organization that facilitates standards development, and tests, audits and certifies products for the food, water, health sciences, sustainability and consumer goods industries to minimize adverse health effects and protect the environment. With operations in 180 countries, NSF is committed to protecting human health and safety worldwide. NSF International is a Pan American Health Organization/World Health Organization (WHO) Collaborating Center on Food Safety, Water Quality and Indoor Environment.