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 flat-lock seams and tag less label enhance comfort. Rugged flex fabric moves with you. Fast dry technology wicks away sweat. The concealed thumb loops keep your sleeves in place when you put on another layer. a Fast dry wicks away sweat and fights odor. a Stay warm with temperature-regulating wool-polyester blend. a Rugged flex technology for ease of movement. a Concealed thumb loops. a Smooth flat lock seams and tagless label enhance comfort.