Mask

In Five Nights at Freddy's 2, the game creator introduced the mask. The mask is used to confuse the animatronics. With it on the animatronics see you (the player) as one of them. The mask does not confuse Foxy, Mangle, or Marionette (the Puppet), so be careful.



Appearance of the Mask
In FNAF2 the mask is a hollow Freddy head, you can breathe and look through the mask meaning you can have it on for any amount of time.