55% Modacrylic 43% Cotton 2% Anti-Static - 240 gsm. HRC 2 inherent protection. Highly breathable and soft Modatech fabric. All Reflective tape, press studs, labels, threads, buttons, mesh and any other trims on the garment are FR rated. FR rated mesh in the waist band to increase air flow and keep you cool. Knee darts for a modern fit.