This Heavyweight Carhartt Force® Poly-Wool Crew base layer top features temperature-regulating wool blend material to keep you warm, dry, and odor free on the coldest days. Smooth flatlock seams and tagless label enhance comfort. Rugged Flex® fabric moves with you. FastDry® technology wicks away sweat. The concealed thumb loops keep your sleeves in place when you put on another layer. Chest size: Small (34-36"), Medium (38-40"), Large (42-46"), X-Large (44-48"), 2X-Large (50-52"), 3X-Large (54-56"). Tall Sizes are 2" longer in sleeves and body than regular sizes.