<p>These Particulate Filters will protect your lungs from organic fumes and dust. Whether used in the workshop for wood dust, painting, blowing in attic insulation, or cleaning out the dusty old attic, these filters will protect your lungs. No more allergies or bad smells.<br>NOTE:<br>1. First of all, confirm the nature of the gas in the environment, apply gas concentration below 0.1% of the environment,<br>oxygen content can not be less than 18%. The environmental temperature is -30 degrees C~+45 degrees C, the effective time of antivirus is 45 minutes, reaching the national standard.<br>2. This product can not be used in airtight environment, please choose the corresponding filter box according to the type and concentration of poison.<br>3. The use of the process of discomfort or a slight odor, you must immediately stop using, and replace the new filter cartridge.<br></p>