Very warm knit with texture and added elasticity for comfort. Double-layer fabric on the sides and bottom of the sleeves helps retain heat thanks to the soft brushed interior and smooth exterior. The material wicks away sweat and dries very quickly. 4-Way Stretch technology allows for better movement in every direction. Practical front 1/2 zip for easier dressing/undressing. Built-in thumbholes help keep the sleeves in place. Reflective elements for better visibility in poor lighting. Odor control technology minimizes odor.