Machine wash or hand wash, remove the power bank before washing. Power Bank Not Include. New Smart Heated Vest: This heated vest is one of the best household care products, works as 5pcs of body warmer packs with infinite energy to keep your body warm all the time. 5 Heating Areas: Built-in quality carbon nanofiber heat elements due to its quick heat-up technology, lightweight, flexible & safe to use. Generate consistent heat for many body parts, including your back, abdomen and waist, helping to keep warm. 3 Heating Levels: 3 heating level from 40/ 104 to 65/ 149. Customers can choose how to heat the heating pads according to your own demands. Your body will be comfortable and does not sweat because of overheating, and comfort as spring. Safety Assurance & Common Battery Pack Needed: Built-in thermal protection module. Once it is overheat, it would stop until the heat return to the standard temperature, so it is 100% safe to use. Upgraded Heated Vest for Men and Women, Smart heated Jacket