The MIRA Safety NBC System Emergency CBRN Gas Mask Kit combines a full-face CM-7M® tactical gas mask, one NBC-77 SOF® CBRN filter, 20 potassium iodide tablets (65 mg each), a canteen, and a drop-leg mounting pouch into a single ready-to-deploy package. The kit weighs 1,286 grams and stores in an 11" H x 5"–7.25" W x 4" D footprint, sized for a home preparedness shelf, vehicle trunk, or bug-out bag. Available in Small, Medium, and Large.

Who this is for

• Household preparedness: anyone building a nuclear, biological, or chemical emergency plan who needs a complete, field-ready kit rather than individual components sourced separately.
• First responders and off-duty professionals: personnel who require a STANAG 4155 / EN 148-1 NATO-threaded mask system compatible with standard 40 mm x 1/7" filters already in their supply chain.
• Travelers and vehicle kit builders: individuals who want compact, pouch-mounted protection accessible within seconds during a regional emergency, wildfire smoke event, or industrial chemical release.

CM-7M gas mask

The CM-7M® full-face respirator is constructed from bromobutyl rubber with a hypoallergenic inner mask. Dual-layer construction reduces fogging and eases breathing resistance, measured at a maximum of 30 Pa on inhalation and 60 Pa on exhalation at 30 L/min airflow. A scratch-resistant polycarbonate visor delivers a general field of vision of at least 70% and a binocular field of vision of at least 80%, with 180-degree visibility. A built-in speech diaphragm provides 95% speech intelligibility so communication remains possible while masked.

The 5-point harness is helmet-compatible and supports up to 30 hours of continuous wear. A pre-installed hydration spout and external canteen are included. The mask also works with Camelbak hydration systems via a Type M adapter (sold separately). Optical inserts for eyeglass wearers are available separately and slide into the mask's rubber slip channel. Both inhalation chambers accept EN 148-1 standard 40 mm x 1/7" NATO-threaded filters; the unused chamber must be sealed with the included filter plug.

NBC-77 SOF filter

The NBC-77 SOF® CBRN filter is composed of sorbents with active and impregnated carbon, housed in an impact-resistant polymer shell. It connects via STANAG 4155 (EN 148-1) compliant 40 mm x 1/7" NATO threading and can be mounted to either the left or right inhalation chamber. The filter is rated for environments with at least 19.5% ambient oxygen. It provides protection from radioactive particles, viruses, bacteria, gases, vapors, and a range of noxious fumes until decontamination can be performed. Both the CM-7M mask and the NBC-77 SOF filter carry a 20-year shelf life.

Note: Due to limited stock, the NBC-77 SOF® filter may ship in Ranger Green or Sandstone instead of Black. Color varies, but performance and specifications are identical across all color variants.

Potassium iodide tablets

Each kit includes 20 ThyroSafe™ potassium iodide tablets at 65 mg per tablet. ThyroSafe™ is the only FDA-approved potassium iodide tablet available in the United States. The tablets help prevent thyroid damage from radioactive iodine exposure, which can dissipate up to 200 miles downwind from a nuclear event. A single dose protects the thyroid for approximately 24 hours; radioactive iodine absorbed after dosing is rapidly flushed from the body. Each tablet features a cross-score for reduced dosing in children. Tablets should be taken before or as soon as possible after exposure to elevated radiation levels. Store at 20–25°C (68–77°F), dry, with foil intact.

Drop-leg pouch

The MIRA Safety® drop-leg gas mask pouch holds the entire assembled kit while keeping it accessible on the leg rather than buried in a bag. The pouch is constructed from 600-denier ripstop nylon with a padded back panel for comfort during extended carry. A Y-harness configuration with heavy-duty straps and quick-release swivel buckles secures the pouch without shifting under movement. A separate cuff pouch (4" H x 2.25"–4.5" W) provides additional storage for the potassium iodide tablets or filter plug.

Storage guidelines

Store the kit in a dark, cool, dust-free location with regular ventilation and no sudden temperature swings. Acceptable storage temperatures range from 10°C to 25°C with relative humidity up to 65%. Do not expose stored equipment to direct sunlight, radiant heat, fuels, solvents, lubricants, or devices that generate electric sparks or ozone. Avoid compressing or deforming rubber facepiece components. Inspect the sealing gasket regularly to confirm an effective seal. Potassium iodide tablets should be stored separately at 20–25°C (68–77°F) with foil intact.

Specifications

Frequently asked questions

What does this kit protect against?

The NBC-77 SOF filter is rated for radioactive particles, viruses, bacteria, gases, vapors, and a range of noxious fumes in environments with at least 19.5% ambient oxygen. The potassium iodide tablets specifically protect the thyroid from radioactive iodine exposure for approximately 24 hours per dose. The mask does not supply oxygen; in oxygen-deficient environments below 19.5%, a self-contained breathing apparatus (SCBA) is required instead.

Is one size of the CM-7M mask right for me?

It depends on your face measurements. The mask is available in Small, Medium, and Large. The 5-point adjustable harness provides a flexible fit, but the sealing gasket must contact bare skin — facial hair or any obstruction that breaks the seal will compromise protection. If you wear eyeglasses, optical inserts are available separately and slide into the mask's built-in rubber slip channel. Contact us if you need sizing guidance before ordering.

Can I use my existing 40 mm NATO filters with the CM-7M mask?

Yes. Both inhalation chambers accept any EN 148-1 standard 40 mm x 1/7" NATO-threaded filter. The unused chamber must be sealed with the included filter plug. Confirm that any third-party filter is compatible with EN 148-1 threading before use.

How long do the mask and filter last in storage?

Both the CM-7M mask and the NBC-77 SOF filter carry a 20-year shelf life when stored correctly — in a dark, cool, dust-free location at 10°C–25°C with relative humidity below 65%, away from fuels, solvents, and ozone-producing equipment. Inspect the rubber facepiece and sealing gasket regularly. Potassium iodide tablets should be stored at 20–25°C with foil intact.

Can children use this kit?

The ThyroSafe potassium iodide tablets include a cross-score specifically for reduced-dose administration to children. The CM-7M mask, however, is sized for adults (Small, Medium, Large) and requires a full facial seal against bare skin. It is not designed for use by young children. Contact us for information on child-specific mask options if needed.

Does this kit ship internationally?

Yes. International shipping is available to 175 countries. All U.S. orders, including Alaska, Hawaii, and Puerto Rico, ship free. International customers should verify local import regulations for gas masks and potassium iodide tablets before ordering, as restrictions vary by country.