* Flame Retardant, Anti-Static, ARC Long Johns (under garment).* 210gsm 60/40 Modacrylic/ cotton with anti static.* Inherently flame retardant fabric.* FR properties will not diminish with repeated laundering* Soft comfortable fabric with contrast FR sewing threadEN ISO 13688: 2013EN 1149-3: 2008EN 1149-5: 2015EN ISO 11612: 2015 (A1 B1 C1)EN ISO 14116: 2015 (3/5H/40)IEC 61482-2-2009EN 61482-1-2-2007 (Class 1 = 4 kA) - Box Arc testingEN 61482 - 1 - 1 : 2009 (EBT50 = 5.9 cAL/cm2) Open Arc testing* Each garment is independantly tested to both box and open ARC standards.* Click ARC production is covered by article 11B certification.