FR MATERIALS: Water-repellent and stain-resistant finish. 6 oz lightweight cotton Rip Stop, flame-resistant treated, FR buttons, FR sewing Threads!Clear FR tag on front.UL NFPA2112 Classified; more FR info on Wash Tag about UL Certification. We attached a small sample inside the package for customers simple FR try. FASHION AND COMFORT: This FR work pant has 9 pockets and an elastic waistband- relaxed fit. Double front fabric on the knee.Double needle stitching on outseam. Left and right enlarged cargo pockets at the thighs with flaps to keep items secure. Two back cargo pockets help you hold more stuff. We did Prewash/ Preshrunk and Wrinkle-Free. Machine wash, no shrink! ENSURE SAFETY AT WORK: Our rip-stop FR work pants meet or exceed the standards for HRC2, Arc rating ATPV 8.0 Calories/cm2, and meet the requirements of NFPA2112 standard on flame-resistant garments for protection of industrial personnel against flash fire,2012 edition. NFPA 70E, ASTM F1506, and CAT2 classified! 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 work. More durable fabric pockets in just the right places, with so many features that help you get the job done. Our workwear protects you every day and helps you do heavy work. MORE USE TIME: UP TO 100 WASHES. Our pants have the appropriate level of protective gear and stay intact through numerous washes. You can wear and wash it over and over again up to 100 times before FR still works.(NFPA2112,ASTM F1506,CAT II)