Mens Red Flame Hi Vis X Back Shirt - ZW137ColoursOrangeFabric93% Meta-Aramid 5% Para-aramid 2% Antistatic - 155 gsmFeaturesHRC 1 inherent protection at an unbelievably light 155 gsm weightAll reflective tape, press studs, labels, threads, buttons, mesh and any other trims on the garment are FR rated..