What is the outer shell material of a structural firefighting coat?

What is the outer shell material of a structural firefighting coat?

• A. Kevlar
• B. Nomex
• C. Cotton Duck
• D. PBI

Answer: (B)

The outer shell is Nomex because it’s a flame-resistant aramid fabric that stays stable under high heat, won’t melt or drip, and helps slow heat transfer to the wearer during exposure to flames or radiant heat. This makes it the standard choice for the outer shell of structural firefighting coats, providing durable, heat-resistant protection as the first barrier. Kevlar adds strength and abrasion resistance but isn’t the primary flame-protective shell material in most sets, Cotton Duck would burn easily, and while PBI is highly fire-resistant, Nomex is the more common, exam-aligned option for the outer shell.

The outer shell is Nomex because it’s a flame-resistant aramid fabric that stays stable under high heat, won’t melt or drip, and helps slow heat transfer to the wearer during exposure to flames or radiant heat. This makes it the standard choice for the outer shell of structural firefighting coats, providing durable, heat-resistant protection as the first barrier. Kevlar adds strength and abrasion resistance but isn’t the primary flame-protective shell material in most sets, Cotton Duck would burn easily, and while PBI is highly fire-resistant, Nomex is the more common, exam-aligned option for the outer shell.