Specification:Style: heated underwearMaterial: polyester fiberColour: BlackPower interface: USBFunction: keep warm, splash water and prevent coldWashing instructions:1. Take out the portable power supply.2. Use neutral detergent and then wash by hand or machine3. Do not rub or beat hard4. Do not wring dry4. It can be used after natural air dryingpacking list:1 * Heating kit (not including power bank)1. The dimensions are all handmade, please slightly deviate within 2 cm.2. The color is real, but due to many factors, such as the brightness or lighting of the computer screen, it may be slightly different from the image on the website3. If you encounter any problems during the purchase process, you can contact us and we will provide you with a perfect solution.4. Due to international logistics issues, the product does not contain a battery, and the heating needs to prepare a mobile power supply with a 5V / 2.1A (or 2.0A) power interface for use.Safety WarningDo not bleach, Tumble dry low or line