PBI Matrix is our proprietary fabric design that employs a durable power grid, weaving high-strength Aramid filaments into the PBI Gold fabric to enhance and reinforce its resistance to wear and tear while retaining its superior flame and heat protection. PBI Matrix was introduced in 2004 as a state-of-the-art outer shell fabric for firefighter’s turn-out gear. Since its introduction, more metropolitan fire departments have chosen PBI Matrix than any other outer shell on the market.