| General Disposable 3-Ply Mask | Spunbond outer layer, melt-blown filtration layer, spunbond inner layer | Usually specified at 95% or higher | Often specified at 95% or higher at the selected test particle size; confirm because PFE is not universally required for general-use masks | Common commercial target: approximately 20–40 Pa/cm², depending on material weight and airflow | Buyer-defined specification; testing may reference ASTM F2100, EN 14683, or an equivalent laboratory method | General hygiene, visitor protection, low-risk environments | Request the exact particle size, airflow rate, sample conditioning, and laboratory report. BFE and PFE values are not interchangeable. |
| Medical Face Mask, Type I | Normally 3 or 4 layers with a melt-blown filtration layer and fluid-resistant outer layer | At least 95% | Not the primary classification requirement under EN 14683; particle filtration data may be supplied as additional information | Differential pressure less than 40 Pa/cm² | EN 14683:2019+A1:2019 | Medical and clinical environments where fluid splash resistance is not the primary requirement | Confirm BFE, differential pressure, microbial cleanliness, and biocompatibility as separate criteria. |
| Medical Face Mask, Type II | 3 or 4 layers with a higher-efficiency melt-blown media and protective outer layer | At least 98% | Not the primary classification requirement under EN 14683 | Differential pressure less than 40 Pa/cm² | EN 14683:2019+A1:2019 | Healthcare settings and procedures without a high expectation of liquid exposure | A high BFE result does not automatically prove high PFE performance; ask for both when particle filtration matters. |
| Medical Face Mask, Type IIR | Type II construction with an added fluid-resistant outer layer | At least 98% | Not the primary classification requirement under EN 14683 | Differential pressure less than 60 Pa/cm² | EN 14683:2019+A1:2019 | Clinical procedures where protection against potentially contaminated liquid splashes is required | Also requires synthetic blood penetration testing; filtration efficiency alone does not demonstrate splash resistance. |
| ASTM Level 1 Procedure Mask | Typically 3 layers: spunbond, melt-blown, and spunbond; may include a fluid-resistant outer surface | At least 95% | At least 95% | Delta P less than 5 mm H₂O/cm² | ASTM F2100; BFE and PFE are commonly tested at 0.1 µm with an airflow of 28.3 L/min | Low-risk procedures and general healthcare use | Compare results only when the test particle size, challenge aerosol, airflow, and reporting units are identical. |
| ASTM Level 2 Procedure Mask | Multi-layer nonwoven structure with improved fluid resistance and filtration media | At least 98% | At least 98% | Delta P less than 6 mm H₂O/cm² | ASTM F2100; synthetic blood penetration resistance is also evaluated | Moderate-risk procedures with possible fluid exposure | Check whether the quoted filtration result is a certified ASTM result or an internal screening result. |
| ASTM Level 3 Procedure Mask | Multi-layer nonwoven structure with the highest fluid-resistance classification within ASTM F2100 procedure masks | At least 98% | At least 98% | Delta P less than 6 mm H₂O/cm² | ASTM F2100; synthetic blood penetration tested at 160 mm Hg | High-risk procedures involving substantial fluid or aerosol exposure | Pressure-drop performance should be reviewed together with fluid resistance because added barrier layers can affect breathability. |
| Disposable Medical Mask under YY 0469 | Usually 3 layers with a melt-blown middle layer and a fluid-resistant outer layer | At least 95% | At least 30% | Pressure differential not greater than 60 Pa/cm² | YY 0469-2011; synthetic blood penetration requirement is at least 16.0 kPa | Medical use in markets requiring the Chinese medical surgical mask specification | Do not compare the PFE value directly with ASTM or EN results without checking particle size and test conditions. |
| Disposable Medical Mask under YY/T 0969 | Commonly 3 layers with melt-blown filtration media | At least 95% | PFE is not the principal mandatory classification value; request it separately if needed | Pressure differential not greater than 49 Pa/cm² | YY/T 0969-2013 | Routine medical and everyday healthcare use without surgical fluid protection claims | Verify whether the product is registered and tested as a medical device rather than sold only as a general protective mask. |
| FFP2 Nonwoven Respirator | Multi-layer molded or folded respirator using electrostatically charged filtration media and a close-fitting seal | Not normally reported as BFE for respirator classification | At least 94% filtration of test aerosols under EN 149 conditions | Maximum inhalation resistance typically 240 Pa at 95 L/min; maximum exhalation resistance typically 300 Pa | EN 149:2001+A1:2009 | Respiratory protection against particles in occupational environments | Fit, inward leakage, breathing resistance, and total classification are more important than a standalone BFE result. |
| N95 Filtering Facepiece Respirator | Multi-layer electrostatic nonwoven filter with a tight-fitting facepiece design | Not normally reported as BFE for NIOSH classification | At least 95% filtration at the NIOSH test challenge, including a 0.3 µm mass-median aerodynamic diameter particle | Maximum inhalation resistance 35 mm H₂O; maximum exhalation resistance 25 mm H₂O with an exhalation valve or 35 mm H₂O without a valve | NIOSH 42 CFR Part 84 | Certified occupational respiratory protection | A surgical mask BFE claim cannot be used to claim N95 equivalence; certification, fit, and inward-leakage requirements are different. |
| High-Breathability Buyer Specification | Low-basis-weight spunbond and melt-blown layers optimized for airflow while retaining filtration performance | Target commonly set at 95–98% or higher, depending on the intended standard | Target commonly set at 95–98% or higher when particle filtration is required | Buyer target often below 40 Pa/cm² for loose-fitting medical masks; the accepted limit must follow the selected standard | Must be linked to one declared standard and one validated test protocol | Long-duration wear, hot climates, and high-throughput healthcare use | Do not accept “high breathability” as a test result. Require numerical differential-pressure data with the test airflow and area stated. |
| Buyer note: BFE measures bacterial aerosol filtration under a specified test setup, PFE measures particulate filtration under a different specified setup, and pressure drop measures airflow resistance. Values should only be compared when the standard, particle size, airflow rate, sample area, conditioning, and reporting units are equivalent. |