FR MATRIALS:7oz mid-weight 100% cotton flame resistant knit,all the matrials from our FR crew/henley shirts and classified by UL.Solid colors and printed patterns up to 9 options. ONE SIZE:The size is one size fits all.stretchable knit. Prewash/Preshrunk,FR tag front. ENSURE SAFETY AT WORK:This balaclava meets or exceeds the standards for HRC2(Arc Rating Atpv 11.6 Calories/cm2)and the requirements of NFPA2112 standard on flame resisant garments for protection of industrial personal against flash fire,2012 edition.NFPA2112 NFPA70E ASTM F1506 MULTI-USE:Made for welders, fitters, ironworkers, electricians, and other industrial workers even at home. It can be ssed for any kind of industrial and Construction works. Our workwear pretect you everyday and help you doing heavy works. Balaclavas Flame Resistant Face Mask Hood