A subtrope of Coat, Hat, Mask. Basically any character that wears a gas mask and, well, a longcoat. Occasionally, there will be a good reason for this, like the character deals with cold weather and/or toxic fumes on a regular basis, but mostly these characters exist because it looks really cool. Trench Coats seem to be the preferred apparel, though other kinds of long coats are acceptable. Can overlap with Gas Mask Mooks if said mooks also include trenchcoats in their uniforms. Not to be confused with Badass Longcoat. Examples of Gas Mask Longcoat include: