Description:  Made from polyester and cotton material, which is not only durable but also comfortable to wear.  Smart heating vest possesses both a humanized heating design and a casual style.  Built to greatly strict quality control standards, resulting in its stable performance.  Excellent quality fabric and cotton is very comfortable and soft to touch and wear.  When worn, it can be more fit to the body because of its elastic fabric, which is of warmth and comfort.  Three-speed temperature adjustment, one-button heating, intelligent heating, suitable for wearing in various temperature environments.  Suitable for everyday wear, light outing, wild fishing, mountain climbing, camping and other outdoor activities.     Specification:  Product name: Electric Heat Vest Clothes Warm Vest Men Heating Coat Jacket For Skiing Camping.  Material: Polyester.  Filling: Down Cotton.  Color: Black.  Size: M/L/XL/2XL/3XL(optional).  Gender: Men/Women.  Voltage: 5V.  Power: 12W.  Power supply: Power bank(not included, you need to prepare or buy one).  Temp. Control: 40/50/65degree Celsius.  Heat area: Front, rear.  Function: Intelligent charging heating, Temp. Control.  Suitable season: Autumn, Winter.  Applicable scenes: Running, hiking, camping, cycling, sports.     Washing Precautions:  1. Take out the power bank and add it with a neutral detergent.  Do not rub it vigorously or beat it. After washing, it is naturally ventilated and dried.  2. Do not use for a long time, please do not access the  power bank.  3. Do not use hot water or strong acid detergent.  4. Do not use the wet clothes. After the rain, please turn off the power and stop using.  5. The usage time depends on the capacity of the charging power bank.  6. USB Interface charging (Power bank is NOT included).     Package Included:  1 X Electric Heated Clothes (not included power bank).