Feature: 1. The product is suitable for cold winter, USB heating clothes. You can adjust on three levels, warmth and comfort. 2. The heating wire is heated inside the carbon fiber and can be folded without damaging itself. 3. It can be quickly heated to 50°C in 30 seconds, and it can be machine-washed and hand-washed. Specification: Name: Electric underwear set Status: Brand new Color as shown Material: 95% cotton + 5% spandex, carbon fiber bundle notes: Product does not contain mobile power Always need mobile power to dissipate heat (5V2A mobile power is recommended) Washing instructions: Take out the detachable charger and wash by hand with neutral detergent. Please do not rub or knock it. It can be used after neutral air-drying. Product packaging: (not including mobile power) Heating underwear set*1 finally: 1. Due to the difference of light and screen, the color of the product may be slightly different from the picture. 2. Due to manual measurement, please allow an error of 2-5cm. We will use the best products and services to help you. We hope every customer is happy every day^_^