What is the percentage breakdown of the outer shell's PBI/Aramid mix?

• A. 70% PBI/Aramid, 30% Kevlar
• B. 60% PBI/Aramid, 40% Kevlar
• C. 50% PBI/Aramid, 50% Kevlar
• D. 80% PBI/Aramid, 20% Kevlar

Answer: (A)

The outer shell is designed to maximize heat protection while staying durable, using a PBI/Aramid blend for heat resistance and Kevlar to boost toughness. A 70% PBI/Aramid and 30% Kevlar mix is the common balance because it keeps the high thermal protection from the PBI/Aramid portion while adding enough reinforcement from Kevlar to improve abrasion and structural durability without making the shell heavier or less heat-resistant. If you shifted more toward Kevlar, you’d gain some strength and abrasion resistance but potentially compromise heat protection and protective weight characteristics. If you increased the PBI/Aramid share, you’d enhance heat resistance further but with diminished reinforcement, affecting durability in tougher wear conditions.