|The Fire-Retardant Suit|
While Disguised: Afterburn Retardant
80% fire damage resistance on wearer
The Fire-Retardant Suit is a passive Primary-slot weapon for the Spy. It's a fire belt that gives 80% fire damage resistance on wearer and afterburn retardant if disguised, rendering Spy-checking almost useless if a Spy has this belt equipped, but the Spy won't have a revolver too, meaning he will only have his knife and sapper.
Using the Fire-Retardant Suit is highly situational, use it if surviving a team full of Pyros/Spy-checking is high priority, if there's no pyros around, use the revolver instead. Recommended maps for the use of this suit are payload and capture the flag maps.