[ gas mask can be crafted with the following recipes

Player Recipe
Primary skill used: tailor(3)
Required skills: fabrication(1)
Time to complete: 60 minutes
Tools required:
> 1 tool with bolt turning quality of 1
Components required:
> 1x pair of ski goggles OR 2x pair of swim goggles
> 3x filter mask
> 1x rubber hose
> 20x charcoal
Byproducts:
(none)
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This recipe can be found in the following books when tailor is at least the required level:
A History of Firefighting (level 3)
Survival Under Atomic Attack (level 3)
Advanced Physical Chemistry (level 4)
chemistry textbook (level 4)
Guide to Advanced Emergency Care (level 3)
Art and Science of Chemical Warfare (level 3)