AireTrust Nano Mask – Large (2020 Version)


4C Air has collaborated with AireTrust to create a KN95 certified face masks using our patented BreSafe nanotech that has exceptional breathability and filtration.  It is a particulate mask with equivalent filtration to NIOSH N95 respirators.  Our patented nanotechnology was developed at Stanford University and allows you to breathe more freely during inhaling and exhaling.  It offers filtration against microscopic particles at the PM2.5 level. Large size.  We also offer Medium and Kids sizes. We are offering our remaining inventory of our 2020 design Large Face Mask.


  • KN95 Certified – GB 2626-2019 (N95 equivalent)
  • Stanford Developed Nanotech Patent
  • Up to 99% Filtration Efficiency
  • Extremely Breathable
  • Ear-Loop Style Bands
  • Adjustable Nose Collar
  • Paper Thin – Weighs only 0.3oz
  • Individually Packaged

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What makes 4C Air masks better than other masks?

Instead of a mix of melt-blow materials commonly used in most hybrid masks today our particle mask uses a patented nano media material that provides amazing filtration compared to other masks.  Our nano masks average up to 99% efficiency and are GB2626-2019 certified (NIOSH N95 equivalent filtration).

In filtration and breathability tests, our AireTrust masks performed significantly better than competitive brands. Our masks only weigh 1/3 of an ounce and fit snugly against the face using ear loop straps.

Ideal for filtering out harmful airborne contaminants at the PM2.5 level.



Additional information

Weight 2 lbs
Dimensions N/A

5 Pack, 10 Pack, 25 Pack


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