Black Stallion's CF2117-NV NFPA 2112 7 oz. FR Cotton Coveralls is constructed of cooler lighter weight 7 oz. FR treated cotton and tested to retain protection through 100 washes. They meet or exceed industry standards for FR and Arc Flash (NFPA 2112 and NFPA 70E -- ARC 2 ATPV 8.7 cal/cm^2)