12.5 oz. Denim; 70/30 Cotton/ Modacrylic, Blue, NFPA 2112 pending; ATPV 15.0 calories/CM2, OSHA 29 CFR 1910.269, NFPA-70E, ASTM F1506-02ael, Flame-resistant, Cooling FR, Wrangler FR garments are designed to self-extinguish to effectively prevent of greatly reduce the severity of burn injuries. Wrangler FR products were created to meet the rigorous requirements of the major protection agencies. These jeans have the classic five pocket styling, a slim seat and thigh, vintage boot leg, flame-resistant pocketing, Nomex FR thread used in all garment seams, a high-quality brass zipper with Nomex FR zipper tape, and safety orange outside ID for high visibility. Work hard and be safe in these FR jeans from Wrangler.