freddy mask (fnaf)
The Freddy Mask is a core game mechanic in Five Nights at Freddy's 2 that acts as the main means of keeping the Animatronics away. It is used to fool any animatronic that sees the wearer into believing that the wearer is an animatronic themselves.
Source: https://fivenightsatfreddys.fandom.com/wiki/Freddy_Mask
This tag implicates freddy_(fnaf) (learn more).