Click Arc Flash Sweatshiirt is Fire retardant, Anti-Static and has ARC Flash. 300gsm 60/40 Modacrylic/Cotton blend fabric. Inherently flame retardant. Fire retardant properties will not diminish with repeated laundering. Ribbed cuffs. Ribbed waistband. For industrial workers exposed to heat. Not suitable for fire fighters. EN ISO 13688:2013 - General requirements for protective clothing. EN 1149-3:2004 - Anti Static - Test methods for measurements of charge decay. EN 1149-5:2008 - Anti Static - Material performance and design requirements. EN ISO 11612:2015 (A1 B1 C2) - Protection against heat and flame. ARC FLASH. IEC 61482-2:2009 - Performance requirements and design requirements. EN 61482-1-2:2007 (Class 1 = 4kA) - Box Arc testing. EN 61482-1-1:2009 (ATPV = 12.6 Cal/cm2) - Open Arc testing. Each garment style is independently tested to both box and open ARC standards. Click ARC production is covered by article 11B certification.