Front view of the DOTpro 320 40mm gas mask filter
Rear view of the DOTpro 320 40mm gas mask filter
Top view of the DOTpro 320 40mm gas mask filter
Bottom view of the DOTpro 320 40mm gas mask filter
Side view of the DOTpro 320 40mm gas mask filter
Side and top view of the DOTpro 320 40mm gas mask filter
Instruction manual for the DOTpro 320 40mm gas mask filter
Full view of the DOTpro 320 40mm gas mask filter, with box and instructions
Label view of the DOTpro 320 40mm gas mask filter
Front view of the CM-6M tactical gas mask with DOTpro 320 40mm gas mask filter
Three quarter view of the CM-6M tactical gas mask with DOTpro 320 40mm gas mask filter
Side view of the CM-6M tactical gas mask with DOTpro 320 40mm gas mask filter

MIRA Safety DotPro 320 40mm Gas Mask Filter

Prix régulier $49.95 Prix réduit$29.95 Épargnez $20.00

Trusted worldwide by multiple police and government agencies in the Czech Republic, Norway, Portugal, Chile, Saudi Arabia, Turkey, Kuwait, Latvia and Lebanon

Full-face panoramic view for unobstructed situational awareness

Integrated hydration tube is compatible with CamelBaks and canteens for a safe and convenient drinking system

Shop with Confidence

1 year factory warranty

5 years on select products

Free shipping for

all U.S. orders

Got a question before you order?

Call us at 888-316-1462


IMPORTANT NOTE: The current batch was manufactured in 10/2020, with an expiration date of 04/2028. This product is currently on clearance and will be discontinued once all units are sold. For that reason, they are offered at a deep discount. 


Combining superior multi-gas protection with a price point that’s tough to beat, our DOTPro 320 respirator filters give you the best bang for your buck when you’re stocking up for yourself, your family, or your organization. Flexible, affordable, and built to last with a 7.5-year shelf life, DOTPro 320 multi-gas filters provide cost-effective protection for known respiratory threats. 

Key Features:

  • 40 mm x 1/7” NATO filter standard (EN 148-1:1999) threading
  • Built to comply with a wide variety of international standards, including EN 14387:2004+А1:2008, EU Health and Safety requirements
  • Practical multi-gas filter that protects the user from toxic industrial chemicals (TICs) and other threats
  • 7.5-year shelf life, with expiration date clearly marked on the filter housing 
  • Easy to deploy and color-coded based on the protection it offers

Flexible and Cost-Effective Protection from Catastrophe 

A gas mask is only as good as the filters attached to it, and here at MIRA Safety, we pride ourselves on offering the very best for every budget—like the flexible DOTPro 320.

This is the best gas mask filter for anyone on a budget or buying for a larger family/group. While our NBC-77 SOF filter still has it beat with a much longer shelf life and broader overall protection, these DOTPro 320 gas mask canisters provide similar levels of protection against a number of common respiratory threats.

That means DOTPro 320 gas mask filters can be just as effective as the premium alternative when facing known threats in a known environment. Engineered to meet strict EU standards and accompanied by relevant filtration data (see below), DOTPro filters are at least equal in “by the numbers” quality to most filters on the market.

Combine that with superior usability, color-coded labeling, clearly marked expiration dates, and rugged construction and you get the best entry-level gas mask filter on the market today.

When it comes to stocking up on gas mask filters, we advise keeping as many good filters on hand as you can comfortably afford. So, even if you’re buying a few high-end NBC-77 SOF filters, it wouldn’t hurt to have a few DOTPro filters for added protection, flexibility, and peace of mind.

NOTE: These gas mask filters are NOT designed to protect the user from chemical warfare agents (CWAs) or nuclear/radiological threats.

The initial filter resistance to constant airflow at a volumetric flow rate of 95 dm/min, Pa (millimeter of water column), max. 

DOTpro 320 А2В2Е2К2Р3 R D

– cyclohexane at a concentration of (17.5 ± 1.7) mg/dm3


– hydrogen cyanide at a concentration of (5.6 ± 0.5) mg/dm3


– sulfur hydride at a concentration of (7.1 ± 0.7) mg/dm3


– chlorine at a concentration of (15.0 ± 1.5) mg/dm3


– sulfur dioxide at a concentration of (13.3 ± 1.3) mg/dm3


– ammonia at a concentration of (3.5 ± 0.3) mg/dm3




DOTpro 320 filters should be stored in a cool, dry place away from hazardous substances. The filters should be stored in their original packaging at temperatures from 50°F to 120°F  with maximum humidity of 98%. Storage in conditions other than those specified can affect shelf life. Expiration date is specified on each DOTpro 320 filter. The guaranteed 7.5-year shelf life is for DOTpro 320 filters in the original Sorbent JSC packaging and from the date of manufacture.