Carhartt FRB194 Flame Resistant Midweight Canvas Waist Overall- Quilt Lined. 8.5 ounce FR canvas: a blend of 88% cotton and 12% high tenacity nylon. 6.75 ounce FR quilt lining: FR modacrylic batting quilted to twill face cloth. Sits slightly below the natural waist. Full seat and thighs. Chap style double front panels. Reinforced back pockets. Carhartt's famous triple stitched main seams. Full ankle to thigh brass zippers with Nomex zipper tape plus inside and outside protective flaps. Reinforced kick panels at leg openings. NFPA 70E Compliant. Flame Resistant fabric by Mount Vernon Mills. HRC 3 ATPV(CAL/CM2) 33.5 Carhartt FR label sewn on back pocket, HRC 3 label sewn on front waistband.