Features: Please kindly note that the power bank is not included in this item. Please use 5V 2A 10000Ah or more power bank. Please kindly note that our sizes are Chinese sizes, which are usually smaller than US & Europe sizes. Please choose your size according to size chart Wireless intelligent temperature control, the optional temperature zone can be adjusted at will. The temperature can be controlled by connecting the mobile phone BT with app, and the temperature can be adjusted selectively on the mobile phone. It is more humanized without opening the clothes. 3-gear temperature control, press the button to facilitate switching. Mobile power supplys, convenient storage, quick heating. Suitable for winter outdoor sports, travel and other use scenarios, to resist cold environment. Large area heating, 8 areas heating, carbon fiber heating technology, temperature controllable, rapid heating. Carbon fiber heating wire, rapid heating, uniform heating, rubbing cleaning, not easy to break wire, long service life, safe. Double sided Alpaca fabric, comfortable and breathable, warm, not easy to deform and wrinkle. Slim three-dimensional cutting, nice elastic, suitable for most kinds of people. Washable, not easy to change, not easy to fade, not easy to shrink. Specifications: Material: Alpaca wool+Spandex Type: Women's Size: M, L, XL, 2XL, 3XL,4XL (optional) Note: We have different size to meet different people demand, please check carefully before your order. Specifications: Name: Heating thermal underwear Condition: New Color: black, gray Gender: man, woman Lining composition: spandex Fabric name: Cotton Packing: OPP bag Size: M, L, XL, XXL, 3XL, 4XL (not including charger, The voltage of the charger is 5v or higher, it cannot Below this voltage range) The package includes: 1 x heated thermal underwear top 1 x heated thermal underwear pants How to use : Charging-Please fully charge the mobile power before use. The plug-in type connects the mobile power supply to the plug located in the pocket. Press and hold the On/Off button for three seconds. The initial temperature is 55-65 degrees (red LED), the intermediate temperature is 45-55 degrees (blue LED), and the lowest temperature is 35-45 degrees (green LED). Cleaning and maintenance: 1. Remove the mobile power supply, add neutral detergent and wash by hand. Do not force or beat it. Before use, please let the washed clothes ventilate and dry naturally. 2. The highest washing water temperature is 30 degrees Celsius 3. In order to ensure the longevity of the clothes, please do not bleach, do not turn to dry, do not iron, do not dry clean, do not use chlorine bleach, hand wash, machine wash (it can be washed with a USB waterproof cover), light Lightly scrub 4. Please keep it dry and don't wring it out by hand.