Material Composition: 100% Polyester Care Instructions: Machine Wash 【Large Capacity Battery & Up to 17 Hours of Operation】● Battery capacity 16000mAh, rated voltage 5V ● Equipped with USB output port *1 ● Operating time: Airflow 1: 7 hours, Airflow 2: 11 hours, Airflow 3: 17 hours (*Operating time is an estimate. It may vary depending on wearing conditions, usage environment, and number of charging cycles.) Charging time: Approximately 5 hours 【2023 Latest Version & Heatstroke Prevention UPF50+・Washable】The wiring is fixed to the clothing, but it can be washed in a laundry net in this state. By taking in outside air, it promotes the evaporation of sweat and effectively lowers body temperature. Also, because it quickly evaporates sweat, it can reduce the discomfort of sweating heavily. It can reduce sweat odor and make it less likely to develop skin diseases caused by sweat, such as heat rash. Being ventilated provides relief from the extreme heat and is effective in preventing heatstroke. Includes box, 2 heaters, battery, cord, laundry bag, and instruction manual.