Bought this year. Only taken out for photos. Please be aware of this if you are interested. ★ NEW gear for extreme heat対策! A cool vest that circulates cold water. ★ This NEW gear creates a comfortable cooling sensation as the cold water in the tank passes through the hoses running inside the vest. ★ The vest material uses durable CORDURA, which can withstand harsh environments. ★ The system circulates water using a battery, and can be used for about 7 hours at full power while replenishing with frozen PET bottles or ice. ★ When using frozen PET bottles as a cooling material, you can also hydrate when they melt, providing an extra measure against the extreme heat. 992000 Specifications of the 3350mAh battery with timer function Charging time: Approximately 2 hours (using a 2A adapter) Number of charge/discharge cycles: Approximately 300 times Output switching: 3-stage switching ※ When using the Ice Water Cooling Vest series, be sure to use the "Ahilssu" dedicated battery. ＊ Mark type: PSE mark / ＊ Notified business operator: ZONE Co., Ltd. ★ Colors may differ slightly from the actual product depending on your computer or smartphone. Please understand. ★ The products listed are also sold in physical stores. There is a possibility that we may have to cancel your order due to stock updates. Thank you for your understanding. ★ Material: 　Outer fabric: 100% nylon 　Lining: 100% polyester 　Side fabric: 80% nylon, 20% polyurethane 　Tank: TPU / Hose: Silicone rubber 　Cooling section: Aluminum vapor deposition, foamed polyethylene, polyethylene, PET Pump output: 7.4V 150mA (maximum) Flow rate: Maximum 320-370ml/min ★ 992000 Specifications of the 3350mAh battery with timer function Input voltage: DC5V/2A (MicroUSB) Output voltage (USB): DC5V/2A (USB Type-A) (DC plug) DC7V/7V20 seconds-45 seconds stop/ 7V20 seconds-1 minute 30 seconds stop Battery capacity: 3350mAh Watt-hour rating: 12.06Wh Voltage: 3.6V Weight: Approximately 88g Size: H97mm x W64mm x D24mm Charging time: Approximately 2 hours ※ When using the Ice Water Cooling Vest series, be sure to use the "Ahilssu" dedicated battery.