FR MATRIALS:From buyers'reviews，before buy pls read our details and tile carefully,this item is a thin hoodie not for cold weather ,we have named very clearly weight on tile and production details,if you wanna warmer hoody choose our 10.5oz midweight in our store!7.5oz cotton knit FR treated,FR sewing threads!Clear FR tag on arms and front.More FR info on neck tag about UL certification.We attached a small sample inside package for customers simple FR try. FASION AND COMFIT:Lightweight cotton FR hoodie good for everyday in 4 seasons! This FR work hoodie provides a perfect and comfortable fit also soft and fashionable.We did Prewash/ Preshrunk and wrinkle-free.The size is big&tall.So Don't buy size up!!! ENSURE SAFETY AT WORK :This garment meets or exceeds the standards for HRC2,arc rating Atpv 9.5 calories/cm2 and the requirements of NFPA2112 standard on flame resistant garments for protection of industrial personal against flash fire,2012 edition.Also NFPA70E ASTM F1506 and NFPA2112 CAT2 classified by UL! MORE USE TIME: UP TO 100 WASHES ,Our shirts has the appropriate level of protective gear and stays enforced up to numerous washes. You can wear and wash it over and over again for up to 100 times before FR still works.(NFPA2112,ASTM F1506,CAT II) MULTI-USE:Made for welders, fitters, ironworkers, electricians, and Other industrial workers even at home. It can be used for any kind of industrial and construction works. Our workwear pretect you everyday and help you doing heavy works. This easy-wearing ,very lightweight hoodies good for summer days，Good quality and Nice color. 7.5OZ, 100% cotton FR knit Shirt wicks away sweat for comfort and fights odors.Rib Work color matches body's color. Our shirts certified NFPA2112 in UL and CAT II.