Carhartt FRB229 BRN flame-resistant work pants in brown duck canvas. These heavy-duty carpenter pants feature a relaxed fit, utility pockets, hammer loop, and triple-stitched seams. Rated HRC 2 and meeting ASTM F1506/NFPA 70E standards, the fabric is self-extinguishing for hazardous job sites. Note visible wear including a hole on the right knee and fraying at the leg openings.