Simple mod changes a Gas mask with goggles to a USSR Style one(tan rubber and green filter) and a Gas mask to a West style one(simply makes it more blackish)

Installation:
The same as others: unzip to a main foulder and allow fallout 4 to use mods

p.s. You can also check my black metall armor no rust mod here: http://www.nexusmods.com/fallout4/mods/3134/?