Not sure where you got the image, but that looks like Classic Combat Armor. So all I can say is it's from The Capital Wasteland or Fallout 4 New Vegas
A reverse image search confirms the same armor being pictured in this mod here: https://www.nexusmods.com/fallout4/mods/27101?tab=posts (refer to the first pinned comment in the forum).
The closest balaclava-esque headwear alternative I've seen is in this mod: https://www.nexusmods.com/fallout4/mods/20088?tab=images