"Wildland fires have no bounds. Wildland firefighters are often required to respond to emergencies in remote areas. To get there, they must hike long distances and wear and carry heavy gear. These challenges are made more difficult by the extreme heat and humidity that typically accompany wildland fires. Additionally, the heavy personal protective gear needed to prevent injuries makes heat stress a major concern for wildland firefighting personnel. The Wildland Firefighters Advanced Personal Protection System initiative aims to develop a National Fire Protection Association (NFPA) 1977 and 1975 certified garment system that improves radiant thermal protection; reduces heat stress; improves the form, fit and function of garments and upgrades requirements that industry uses to develop advanced gear."
U.S. Department of Homeland Security: https://www.dhs.gov/