6.75-ounce, 48% modacrylic / 37% lyocell / 15% aramid FR knit. Meets the performance requirements of NFPA 70E. UL® classified to NFPA 2112. Meets ANSI / ISEA 107 standard. Meets ANSI Class 3, Type R visibility standard; 3M™ Scotchlite™ reflective material