Therm-ic Men's Ultra Warm S.E.T Baselayer Top with Body Pack

First heated layer for your outdoor adventures; Heating: Smart Elastic technology for even heat distribution; Breathable: Moisture-Vent technology in the abdominal area for rapid moisture wicking; Isolating: Buffer-Cones on shoulders and elbows for excellent thermal insulation; Offers optimal freedom of movement; Optimal thermal comfort to make the most of your outdoor adventures; Composition: 76% Polyamide, 18% Polypropylene, 6% Elastane; Comes with a Body-Pack external battery; USB charger included