May 4, 2023 – Sale suspended until further notice. Exemption are filters for children's masks.

Protective filters

Especially in the event of the use of weapons of mass destruction, we recommend using filters from the company SIGMA Výzkumný a vývojový ústav, s.r.o. (SIGMA Research and Development Institute, Ltd.), who, among other things, have been involved in the production of protective filters for decades. It is worth noting that each of these filters undergoes a thorough quality control check. As we have full confidence in these filters, we also offer them on our website.

For protective filter production, foreign raw materials (activated carbon and filter paper) are required, the delivery of which can take several months and therefore it is advisable not to delay the purchase of filters until the last minute.

The particulate filter P3 R

Weight: 95 g / 0.2 lb / 3.4 oz
Dimensions: 5.6 × 11 cm; 2.2 × 4.3 in
Shelf life: in the case of the correct storage of an unused filter, 10 years or more; however in terms of reliability the manufacturer quotes a 3-year expiration date
Thread: Rd 40 × 1/7″ (it is also possible to provide an older type of thread – OZ 40 × 4 mm)
Class: P3 R
Use: especially in the event of an attack carried out by biological, nuclear or radiological weapons, i.e. mainly against viruses, bacteria and radioactive aerosols; if the filter is not too clogged with dust, it can be used repeatedly, which is quite normal
Manufacturer: SIGMA Výzkumný a vývojový ústav, s.r.o., The Czech Republic

The P3 R particulate filter is intended primarily for the protection of civilians and, in combination with a full-face mask, it provides reliable protection of the respiratory system in the event of the use of biological, nuclear and radiological weapons. It can also be used with half masks or filter ventilation units.

For protection of the respiratory system in the event of industrial emergencies, chemical or toxin attacks, it is necessary to use a protective combined filter with specially impregnated activated carbon. For this purpose, we recommend protective combined filters MOF-6 or OF-02 CBRN.

For peace conditions (epidemics etc.) we recommend the purchase of at least 2 filters, and at least 5 filters for combat conditions.

Terms of delivery: details are in the terms and conditions

Price: 289 CZK (approx. 13 USD or 11 EUR) (when buying 3 or more filters we include our own detailed instruction on the approximate period of use during combat conditions)

The price in USD or EUR depends on the current rate of exchange of the Czech crown on the date of payment.

By purchasing, you agree to the terms and conditions.

Protective combined filter MOF-6

Weight: 365 g / 0.8 lb / 12.9 oz
Dimensions: 9.5 × 11 cm; 3.7 × 4.3 in
Shelf life: in the case of the correct storage of an unused filter, 10 years or more; however in terms of reliability the manufacturer quotes a 3-year expiration date
Thread: Rd 40 × 1/7″ (it is also possible to provide an older type of thread – OZ 40 × 4 mm)
Design: combined
Type and class: A2B2E2K2HgP3 D R
Use: in particular, in the event of industrial emergencies or attacks by nuclear, chemical, biological, toxin or radiological weapons; if the filter has not been used in an environment with a large amount of pollutants for example, it is not a a problem to use it repeatedly
Manufacturer: SIGMA Výzkumný a vývojový ústav, s.r.o., The Czech Republic

The MOF-6 filter is designed primarily for the protection of civilians and members of the emergency services. In combination with a full-face mask, it provides reliable protection of the respiratory system not only in the event of various industrial emergencies, but also during the use of nuclear, chemical, biological, toxin and radiological weapons. It can also be used with half masks. For filter ventilation units, in combination with chemical suits for example, it is more suitable to use OF-02 CBRN protective combinated filters.

This filter also protects against mercury (Hg) vapors and its compounds and nitrogen dioxide (NO₂), but not anymore against carbon monoxide (CO), carbon dioxide (CO₂), nitrous oxide (N₂O) and nitric oxide (NO).

For peace conditions (industrial emergencies etc.) we recommend purchasing 2 filters, and at least 5 filters for combat conditions.

Terms of delivery: details are in the terms and conditions

Price: 559 CZK (approx. 26 USD or 22 EUR) (when buying 3 or more filters we include our own detailed instruction on the approximate period of use during combat conditions)

The price in USD or EUR depends on the current rate of exchange of the Czech crown on the date of payment.

By purchasing, you agree to the terms and conditions.

Protective combined filter OF-02 CBRN

Weight: 365 g / 0.8 lb / 12.9 oz
Dimensions: 9.5 × 11 cm; 3.7 × 4.3 in
Shelf life: in the case of the correct storage of an unused filter, 10 years or more; however in terms of reliability the manufacturer quotes a 3-year expiration date
Thread: Rd 40 × 1/7″ (it is also possible to provide an older type of thread – OZ 40 × 4 mm)
Design: combined
Type and class: A2B2E2K2SXP3 D R
Use: in particular, in the event of industrial emergencies or attacks by nuclear, chemical, biological, toxin or radiological weapons; if the filter has not been used in an environment with a large amount of pollutants for example, it is not a a problem to use it repeatedly
Manufacturer: SIGMA Výzkumný a vývojový ústav, s.r.o., The Czech Republic

The OF-02 CBRN filter (CBRN – chemical, biological, radiological and nuclear, i.e. chemical, biological, radiological and nuclear weapons), is designed for the needs of the military. In combination with a full-face mask, it provides reliable protection of the respiratory system. Apart from capturing pollutants arising from various industrial accidents for example, or during the use of weapons of mass destruction, (i.e. nuclear, chemical, biological, toxin and radiological weapons), it also captures mercury (Hg) vapors and its compounds, plus nitrogen dioxide (NO₂). It can also be used with half masks or filter ventilation units connected to chemical protective suits for example.

This filter does not protect against carbon monoxide (CO), carbon dioxide (CO₂), nitrous oxide (N₂O) and nitric oxide (NO).

For peace conditions (industrial emergencies etc.) we recommend purchasing 2 filters, and at least 5 filters for combat conditions.

Terms of delivery: details are in the terms and conditions

Price: 586 CZK (approx. 27 USD or 23 EUR) (when buying 3 or more filters we include our own detailed instruction on the approximate period of use during combat conditions)

The price in USD or EUR depends on the current rate of exchange of the Czech crown on the date of payment.

By purchasing, you agree to the terms and conditions.