Which PPE is designed to allow responders to operate near nearly total flame environments?

• A. Nomex Flight Suit
• B. FR Coveralls
• C. Chemical Protective Suit
• D. Proximity Suit

Answer: (D)

Proximity suits are built to handle extreme radiant heat and allow you to operate close to intense flames. The outer shell is aluminized and highly reflective, paired with thick insulation, so heat is reflected away and transfer is slowed. This combination lets responders work near near-total flame environments for short periods, such as during aircraft or large fuel fires, while maintaining enough cooling and protection to prevent rapid heat injury. By contrast, a Nomex flight suit and FR coveralls offer flame resistance for general exposure but aren’t designed to withstand the high radiant heat of near-total flame conditions. Chemical protective suits protect against chemicals and aren’t intended for flame exposure. So the proximity suit is the appropriate choice for operating in those extreme heat environments.