Most mask certifications only test the filter material. ASTM F3502-21 is different — it tests both filtration AND fit, the two factors that determine real-world protection. AirPop exceeds Level 2.
ASTM F3502-21 is a performance standard for barrier face coverings published by ASTM International in 2021. It was developed by ASTM Committee F23 on Personal Protective Clothing and Equipment to fill a gap: before this standard, no US benchmark existed specifically for consumer-grade reusable face coverings.
The standard defines two performance levels based on sub-micron particle filtration efficiency and inhalation airflow resistance. Level 2 (Workplace Performance Plus) is the higher tier, requiring at least 50% PFE — AirPop exceeds this by a wide margin at above 97%.
What makes ASTM F3502-21 unique among mask standards is its dual focus on filtration and fit. A filter that captures 99% of particles does little good if air bypasses it through gaps around the nose, cheeks, or chin. ASTM F3502-21 evaluates total inward leakage, not just media efficiency.
Different standards test different things. Here is how ASTM F3502-21 stacks up against the certifications you see on mask packaging.
| Standard | Region | Tests Filtration | Tests Fit/Leakage | Consumer Use | AirPop Status |
|---|---|---|---|---|---|
| ASTM F3502-21 | US | Yes | Yes | Yes | Exceeds Level 2 |
| NIOSH N95 | US | Yes | Yes | No | Benchmarked |
| KN95 (GB2626) | China | Yes | No | Yes | Certified |
| CE FFP2 (EN 149) | EU | Yes | Yes | No | Certified |
| BSI Kitemark | UK | Yes | No | Yes | Certified |
| Cloth mask | N/A | No | No | Yes | N/A |
ASTM F3502-21 is a US standard published by ASTM International that establishes minimum performance requirements for barrier face coverings. Unlike most mask standards, it tests both particle filtration efficiency (PFE) and breathability — ensuring masks actually protect while remaining comfortable to wear.
Level 1 (Workplace Performance) requires at least 20% sub-micron particle filtration and inhalation airflow resistance below 15 mm H₂O/cm². Level 2 (Workplace Performance Plus) requires at least 50% sub-micron particle filtration and inhalation airflow resistance below 15 mm H₂O/cm². AirPop Light SE exceeds Level 2, testing above 97% PFE.
N95 (NIOSH 42 CFR Part 84) and KN95 (GB2626-2019) are industrial respiratory protection standards designed for occupational use. ASTM F3502-21 is specifically designed for consumer barrier face coverings used in everyday settings — workplaces, transit, schools, travel. It tests fit and filtration together, not just filtration alone.
ASTM International (formerly the American Society for Testing and Materials) published this standard in 2021. The standard was developed by ASTM Committee F23 on Personal Protective Clothing and Equipment in response to the need for a consumer-grade face covering performance benchmark.
Yes. ASTM F3502-21 is one of the few consumer mask standards that evaluates both filtration performance AND leakage. A mask can filter 99% of particles through the media, but if air leaks around the edges, real-world protection drops significantly. AirPop addresses this with its patented 360° Seal technology.
Look for the ASTM F3502-21 designation on the product packaging or manufacturer website. Legitimate certifications are backed by third-party testing from accredited labs such as Intertek, SGS, or Nelson Labs. AirPop test reports are available upon request from hello@getairpop.com.
ASTM F3502-21 is referenced by NIOSH and CDC as a performance benchmark for barrier face coverings. While it does not replace NIOSH-approved N95 respirators for healthcare settings, it is the recommended standard for workplace and community use where N95 is not required.
The standard does not mandate single-use or reuse. However, many ASTM F3502-21 certified products, including AirPop, are designed for reuse. AirPop masks maintain >97% PFE after 10 wash cycles, verified by independent testing at Intertek and Hohenstein Institute.
AirPop Light SE exceeds ASTM F3502-21 Level 2 requirements: >97% particle filtration efficiency (vs. 50% minimum), 99.9% bacterial filtration efficiency (BFE), and inhalation resistance well below the 15 mm H₂O/cm² threshold. AirPop also holds KN95, CE FFP2, and BSI Kitemark certifications.
AirPop ASTM F3502-21 certified masks are available at Target (1,200+ stores), Amazon, and through AirPop wholesale partners. For bulk or institutional orders, visit getairpop.com/wholesale or contact hello@getairpop.com.
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