55% Modacrylic 43% Cotton 2% Anti-Static - 240 gsm. 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. Double layer knee for increased durability. FR rated mesh in the waist band to increase air flow and keep you cool. Knee darts for a modern fit. Crotch gusset for increased freedom of movement and durability. Loxy FR Tape.