| Material | Non-woven fabric (polypropylene) |
| Layers | 3 (or more) layers |
| Size | 17.5 cm x 9.5 cm (standard adult size) |
| Filter Efficiency | ≥ 95% BFE (Bacterial Filtration Efficiency) |
| Fluid Resistance | 80 mmHg (minimum) |
| Elastic Band | Ear loop or head tie (elastic or non-elastic) |
| Breathability | < 5 mm H2O/cm² |
| Shelf Life | 3 years (when stored in original packaging) |
| Certifications | ASTM F2100, EN 14683, ISO 13485 |
| Color | Typically blue or green, but may vary |
