Conquer any CBRN threat with MIRA Safety's C21 Full Face Respirator - the pinnacle of protection engineered for those who demand the best. This state-of-the-art mask combines uncompromising safety with tactical versatility, empowering you to face the most challenging environments with absolute confidence.  Low CO2 inner mask design reduces fatigue and maintains mental alertness during extended operations. Auto shut-off valve system enables safe filter changes while maintaining protection (accessory coming soon). Temperature-tested protection from -40°C to +70°C ensures reliability in any climate condition. EN136:1998 Class 3 certification exceeds highest industry safety and performance standards. C21 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. Available Accessories   Visor Outserts  (comes with clear, sunlight, also available in mirror, breach, blueblocker, and laser) Head Harness (comes with fabric available in rubber material) Microphone Spectacle Kit  Features and Benefits  Maximized protection: The C21 is fully compatible with 40mm threaded filter cartridges (sold separately). Comfortable wear: C21 features a comfortable 6-point harness available in 3D fabric for easy donning and doffing. Rubber harness sold separately. Chemical-resistant: This full face gas mask is treated for chemical resistance to facilitate easy decontamination. Durable visor: The visor polycarbonate lens is scratch resistant and extra wide, providing a wide field of vision and fully compatible with corrective eyewear and aiming systems. Adjustable inhalation/exhalation connector: Patented side vent design allows connector to be switched to accommodate left and right shooters. Reduced respiratory resistance: Breathe easily under duress with protection against gasses, smoke, and CBRN particulates.  Compatible with most helmets: Obtain optimal safety with fully compatible yet comfortable mask respirator. Reduced mist: Proprietary technology increases visibility while minimizing visor fog. Easy communication: The integrated speech diaphragm amplifies your voice even as the mask provides a full face seal. C21 Full Face Respirator Details Our patented side inhalation and exhalation connector system allows easy switching between left and right configurations. This innovative design ensures optimal performance for all users, regardless of shooting preference or tactical setup. The C21 features a NATO-standard connector fully compatible with 40mm threaded particulate filters. The breathing apparatus can be adjusted to accommodate left and right shooters, while the air connector system features advanced technology that prevents contaminated air from leaking into the mask during filter replacement. The visor is ballistic-resistant for advanced eye protection and provides a comfortable fit around corrective eyewear or visual aiming systems. The entire mask is treated to prevent stagnation of chemical agents, for chemical resistance and ease of decontamination. Fully compatible with most helmets, the C21 is prepared to handle any and all CBRN threats with toxic chemical protection that meets or exceeds EN 136 requirements for a full face mask respirator.  Materials  Visor Polycarbonate Head Harness 3D Fabric (Rubber Sold Separately) Connectors PA+GF Bromobutyl Rubber Face Piece Technical Specifications  Weight With fabric harness: 615 grams; With rubber harness: 680 grams Color Black Inhalation Resistance at 160 l/min 1.9 mbar CO2 Rebreathing 0.6% Inhalation Resistance at 95 l/min 0.7 mbar Effective field of vision (natural) 91.7% Inhalation Resistance at 30 l/min 0.3 mbar Effective field of vision (binocular) 88.2% Exhalation Resistance 160 l/min Number of sizes 3 Filter Compatibility Fits STANAG filters Shelf Life 10 years in original packaging with proper storage (20 years with a vale change) Sizing  The C21 is available in three sizes: Small, Medium, and Large. Each size is available in a left or right configuration.  Each full face mask size comes with the option for a rubber or 3D fabric 6-point head harness.  Prepare for any threat with a C21 gas mask with maximum compatibility with optical equipment and protective gear. Buy now and never be without protection when the worst happens.