Carhartt Men's Flame Resistant Base Force Cold Weather Weight Top 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 Self fabric crewneck and cuffs Smooth flat lock seams Meets the performance requirements of NFPA 70e and is ul classified to NFPA 2112