You’ve spent so much of your life around fires that smoke no longer affects you the way it does other creatures.
Benefit: Your vision isn’t impaired by non-magical smoke, and you gain a +5 trait bonus on Fortitude saves to avoid coughing and choking because of smoke inhalation. This trait confers no benefits against magically created smoke, such as that produced by pyrotechnics.
Pathfinder Player Companion: Kobolds of Golarion. © 2013 Paizo Publishing, LLC; Authors: Tork Shaw, Mat Smith, and Jerome Virnich.