National Safety Apparel¨ CARBONCOMFORT„¢ FR Medium Tan Henley Shirt made of 6 oz spentex NGI material offers a arc rating protection of 13 cal/sq.cm. HRC-2 shirt features a latest carbon fabric technology provides magnificent flame resistance that will not wash out. Moisture wicking shirt featured with antimicrobial property helps to resist odors. FR Fabric shirt will not melt