Apparel, Mannequins

Matching headwear: Wrapped Cap

There is a very small chance to be awarded at the completion of: 
Quest
  One of Us
Events or daily quests in The Mire 
  Always Vigilant (event; does not matter where on the map the event occurs)
  Heart of the Swamp (public event)
  Idle Explosives (daily)
  Irrational Fear (event) 
  It’s a Trap (event) 
  Play Time (daily) 
  Queen of the Hunt (daily)
  Waste Not (daily)

Not to be confused with the common apparel Fire Breathers Uniform and Fireman Uniform

Unlike the other rare apparel, the matching headwear for the Fireman Uniform is also rare

There is a very small chance one piece of the set will be awarded at the completion of: 
Quests
  Final Departure 
  Strength in Numbers 
Events or daily quests in the Forest
  Back on the Beat (event)
  Collision Course (triggerable event)
  Ecological Balance (daily)
  Feed the People (public event)
  Fertile Soil (triggerable event)
  Fly Swatter (event)
  Leader of the Pack (event)
  The Path to Enlightenment (public event)
  Project Beanstalk (event)
  Strange Brew (daily)
  Tea Time (public event) 
Events or daily quests in the Toxic Valley
  Big Game Hunter (daily)
  Buried with Honor (daily)
  Dogwood Die Off (event)
  Grafton Day (triggerable event)
  Jail Break (event)
  Manhunt (event)
  Patrol Duty (triggerable event)
  Swarm of Suitors (public event)
  Target Rich Environment (daily)
  Thrill of the Grill (daily)
 Certain Enclave events
  A Real Blast
  Bots on Parade
  Dropped Connection 
  

Matching headwear: Green Hood

There is a very small chance to be awarded at the completion of: 

Events or daily quests in The Mire   
  Always Vigilant (event; does not matter where on the map the event occurs)  
  Heart of the Swamp (public event)  
  Idle Explosives (daily)  
  Irrational Fear (event)   
  It’s a Trap (event)   
  Play Time (daily)  
  Queen of the Hunt (daily) 
  Waste Not (daily)

Note: The Leather Coat and Traveling Leather Coat are identical aside from a backpack on the Traveling Leather Coat. The Traveling version has half the drop rate as its sibling (0.01% vs 0.02%) but is less desirable by most collectors and thus has a lower value