Our new Guide Pro Smart Heated Mittens feature clim8 intelligent heating technology that regulates warmth based on your body temperature and activity level. Just set your desired temperature on the app and these AI-powered mittens will continually adjust to your needs.These innovative mittens feature WeatherEdge Plus waterproof technology to keep your hands dry in wet conditions and PrimaLoft Gold insulation to retain heat. The durable and flexible Pittards leather shell is designed around the hand's natural shape for exceptional comfort and maximum dexterity in cold conditions.Run time depends on heat settings, use, and range of wear.NOTE ON SIZING: These mittens feature a performance fit which is secure on the hands and fingers without restricting mobility. Please refer to the size chart to get the best fit. WARNING: The charging pin for this product can expose you to lead, which has been identified as a harmful substance. See Eddie Bauer Guide Pro Smart Heated Mittens - Black