Designed to self-extinguish to effectively prevent or greatly reduce the severity of burn injuries. Created to meet the rigorous requirements. Compliant with OSHA 29 CFR 1910.269, NFPA-70E, ASTM F1506-02ael. Arc-resistant button waistband closures. High quality brass zipper with Nomex FR zipper tape. Flame resistant pocketing. Reinforced back pockets. Nomex FR thread used in all seams. Fits over boots. Color: Stonewash, Prewash. (NOTE: these are blank, no logo on them.)