C21™ Full Face Respirator Size Recommendations
| Size No. |
Size in inches (chin to brow) |
| Size 1 |
5.19" – 5.51" (small) |
| Size 2 |
5.51" – 5.82" (medium) (universal most used) |
| Size 3 |
5.82" – 6.14" (large) |
Determining your ideal respirator fit depends primarily on facial dimensions. While specialized measurement tools exist, we've simplified the selection process:
The mid-size option accommodates approximately 95% of users. Consider choosing small if you have a petite build (under 130 pounds) with narrow facial features. Those with broader faces or larger builds (exceeding 250 pounds) typically benefit from the large size.
Verify proper fit through the seal check: Block the intake valve and inhale deeply - the mask should create a tight seal against your face without air leakage.
Remember to separately purchase compatible filters and select your preferred size from the available options.
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Maximized protection: The C21™ full-face respirator is fully compatible with 40mm threaded NATO filter cartridges (sold separately).
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Comfortable wear: C21™ features a comfortable 6-point harness available in 3D fabric for easy donning and doffing. Rubber harness sold separately.
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Chemical-resistant: This full-face gas mask is treated for chemical resistance to facilitate easy decontamination.
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Durable visor: The visor polycarbonate lens is scratch resistant, anti-fog and extra wide, providing a wide field of vision and fully compatible with corrective eyewear and aiming systems.
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Adjustable inhalation/exhalation connector: Patented side vent design allows connector to be switched to accommodate left and right shooters.
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Reduced respiratory resistance: Breathe easily under duress with protection against gases, organic vapor, sand, smoke, and CBRN particulates.
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Compatible with most helmets: Obtain optimal safety with fully compatible yet comfortable mask respirator.
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Reduced mist: Proprietary technology increases visibility while minimizing visor fog.
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Easy communication: The integrated speech diaphragm amplifies your voice even as the gas mask provides a full face seal.
