The Coldwork�?M-Pact Heated Gloves and the black ColdWork�?Heated Glove are created with the clim8® intelligent Thermal Technology Heating System that automatically turns on when glove is placed on hand. These gloves allow for a heating system that adjusts and regulates internal temperature based on body and outside temperatures for optimum hand warmth & temperature at all times. The Coldwork�?Original® Gloves and the Coldwork�?M-Pact® Gloves are part of a collection featuring 3M�?Thinsulate�?/a> made to trap warm air to help regulate your body temperature.