Rogue Boss Knight's full head covered mask. From the game Escape from Tarkov.

Installation:

Drag and drop both files to:
mods\update\x64\dlcpacks\mpheist\dlc.rpf\x64\models\cdimages\mpheist_streamedpeds.rpf\mp_m_freemode_01_male_heist

Credits:
Battlestate games, Escape from Tarkov,Stan_Jacobs