Our top priority is keeping you safe on the job site, which is why we take flame resistance seriously. Our Wrangler FR jeans are built to last through the rigors of dangerous and rugged working conditions, so you can dress for the job with complete confidence. Each pair of our flame-resistant (FR) jeans is made of pre-washed, heavyweight cotton denim for a comfortable feel and fit, but that's not all. With a full seat and thigh, these FR jeans feature the same fit as the Original Cowboy Cut 13MWZ that you know and love. They come fully equipped with our authentic five-pocket styling, 'W' stitching on the back pockets, and a bright orange ID patch on the outside for increased visibility. Not too loose. Not too tight. Plus, these hard-working jeans fit over boots. Certifications vary by wash Prewash: ATPV 24.0 CAL/CM2. Meets NFPA 70e/NFPA 2112 Certification. CAT2. Dark Wash: ATPV 21.0 CAL/CM2. Meets NFPA 70e/NFPA 2112 Certification. CAT2.