OccuLux® High Visibility Flame Retardant Vest features a lightweight, flame retardant material called Modacrylic which is arc rated at 5.5 cal/sq meters which meets ASTM F1506 for flame resistance. Flame Resistant thread, binding and hook & loop closure continues the ASTM conformation. One 360° horizontal and two vertical shoulder stripes of 2" wide 3M™ Scotchlite™ reflective tape.