Fight the cold and let technology lend a helping hand in keeping you warm. In cold conditions, the Nanostitch Heating fabrics keep your body temperature up by trapping natural body heat within the garment. The heat is captured within the fabric for an extended period of time, thus guaranteeing optimum heat retention. The insulation is most effective when the fabric is used as a base layer, nearest to the body, making it the perfect knit for winter wear.