Carhartt Men's Big & Tall Flame Resistant Base Force Cold Weather Weight Bottom 50% Cotton, 24% Modal, 24% Supima Cotton, 2% Spandex Imported Machine Wash Relaxed fit Carhartt force fights odors and its fast dry technology wicks away sweat for warmth and comfort Smooth flat lock seams Carhartt for and cat 2 labels sewn to exterior Meets the performance requirements of NFPA 70e