98% Cotton / 2% Spandex; 9 oz Relaxed Fit, Sits at Waist, Reinforced Knees, Reinforced cargo pockets with flaps and concealed snaps, Reinforced back pockets, ARC-resistant button at waistband, nomex thread used on all garment seams, Flame resistant pocketing. Certifications: NFPA 2112 Ratings: CAT2 8.9 CAL/CM2 Compliant With: NFPA-70e ATSM F1506