This Flame Resistant Relaxed Fit Twill Pants features: Sits slightly below waist, extra room in seat and thigh, straight leg, Heavy duty tack button closure, brass zipper fly, Deep back welt pockets, UL-Certified NFPA 2112 standard on flame-resistant, Meets NFPA 70E electrical safety requirements, ARC Rating 12.2 and HRC 2. Material: Twill, Cotton, Nylon.