Bulwark FR Men's 7 oz. Dress Uniform Shirt - CAT 2 - SLU2 Fabric: EXCEL FR ComforTouch Flame-Resistant 7 oz. 88% cotton / 12% nylon Hazard Risk Category: CAT2 - NFPA 70E and NFPA 2112 Compliant Protection: Arc Rating ATPV 8.6 calories/cm2