Mucous Membrain

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The Spy expressing his disgust

The Mucous Membrain is a community-created cosmetic item for the Pyro. It is a glowing, green, gelatinous glob of goo erupting from the Pyro's head, completely covering its right eyehole.

This item can only be worn around Halloween or during a Full Moon; at other times of the year, it does not appear in gameplay, unless the server has Halloween mode enabled. However, it can be equipped at any time and can still be viewed on the loadout screen even when it is not visible during games.

The Mucous Membrain was contributed to the Steam Workshop.

Update history

October 29, 2013 Patch (Scream Fortress 2013)

  • The Mucous Membrain was added to the game.


  • The name is a combination of the terms mucous membrane, referring to the thin layer of tissue covering most openings and internal organs of the human body, and the brain.