AR15.Com Archives
 How do you determine your gas mask size?
hardwarz  [Member]
2/16/2009 4:32:30 PM
Years ago, I rememberd my USMC dog tags had my gas mask size on them. Well, I've since lost my dog tags over the years. I'd love for them to be replaced. I found this format for what I use to have:

SMITH
JOHN D O POS
123-45-6789
USMC L
CATHOLIC

Problem is, I don't remember my mask size. How do you determine your gas mask size?

I though that tags would be a good thing in SHTF situation where a lot of my friends are prior military and also, just in case of an accident, the tags can tell who I am, blood type, etc. Maybe I'll leave off the SSN though....

Hardwarz
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hammerkill  [Member]
2/16/2009 4:42:52 PM
I have an israeli gas mask. I don't know what size but it is for an adult. When i cover the intake and breathe in the mask collapses so i know it is a good fit. This is what i found about masks, it just says the same thing i did. I don't remember my dog tags having a mask size but that was a long time ago.

http://www.osha.gov/dts/shib/respiratory_protection.pdf
DanishM1Garand  [Member]
2/16/2009 6:47:55 PM
We tried on gas masks until it fit. Mine was a medium.

Find a reserve unit with an understanding NBC NCO and try them on. M40 and M17a1 sized out about the same IIRC. You could also ask for a copy of your SRB from the Marine Corps it will be somewhere in the info they had on you.
Ben762  [Team Member]
2/16/2009 7:09:29 PM
This last time I got one issued, the tech told me its based on height. Although this is for the MCU 2/P.. I don't know if different masks have different measuring & sizing methods.

I'm 5'11" and wear a large. I have a big head though and another person of comparable size could probably wear a medium. YMMV I guess.
OKshooterHRS  [Team Member]
2/16/2009 7:44:41 PM
Most people wear medium you will just have to fit test it and then pressure check it to make sure the seal is air tight

I wear one for work quite often well its a full face respirator but its essentially a gas mask if need be
REELDOC  [Member]
2/17/2009 9:10:41 PM
The two methods are qualitative and quantitative. Qualitative testing is essentially a smell test. Quantitative testing is done with a computerized system. Both tests require the wearer to don the mask and perform various manuevers that affect the position of the head to make sure the mask fits in all situations. 75% of my hazmat team wore a medium, and it was split about even for small and large. Additionally,the same size mask from two different manufacturers (ex. Scott and MSA) may not fit the same which is why there are requirements for testing with all masks you may be required to wear. Facial hair is a no-no. Mask fit tests must be done annually.

If you must buy one without a test, don the mask and place your hand over the inlet. Inhale and hold your breath so that the mask sucks to your face. Best to do it with your head up, head down and at each side.
OKshooterHRS  [Team Member]
2/17/2009 10:03:34 PM
Originally Posted By REELDOC:
The two methods are qualitative and quantitative. Qualitative testing is essentially a smell test. Quantitative testing is done with a computerized system. Both tests require the wearer to don the mask and perform various manuevers that affect the position of the head to make sure the mask fits in all situations. 75% of my hazmat team wore a medium, and it was split about even for small and large. Additionally,the same size mask from two different manufacturers (ex. Scott and MSA) may not fit the same which is why there are requirements for testing with all masks you may be required to wear. Facial hair is a no-no. Mask fit tests must be done annually.

If you must buy one without a test, don the mask and place your hand over the inlet. Inhale and hold your breath so that the mask sucks to your face. Best to do it with your head up, head down and at each side.


+1 ya i was just trying to sum it up

I had to fit test with taste test
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