Fabric: 95% polyester + 5% spandex Heating piece eight pieces: abdomen 2 pieces + calf 2 pieces + knee 2 pieces + waist 2 pieces Metal fiber wire heating, 30 seconds can be up to 65 C temperature, metal fiber heating wire can be machine washable, hand washable, any fold is not easy to break the wire heat conversion high Endurance time: 10,000 mA (50W) mobile power, high temperature (about 65 degrees) 4-6 hours, medium temperature (about 50 degrees) 5-6 hours, low temperature (low temperature 40 degrees) 6-7 hours. USB power supply interface: USB-5V/ 2A power supply interface, connected to the action power can be used Machine washable, no longer worry about washing, Note: Cleaning must be gentle and light wash, can extend the service life of the heater (does not include the battery, does not include rechargeable treasure)