Purchased on Amazon. I was scheduled to do outdoor work at the company, but I was transferred to another department and now work indoors. I don't do outdoor activities or fishing, so I will give this to someone who needs it for the intense heat this year. Thank you. ● Specifications Includes battery (can be used for approximately 13 hours in continuous mode) PS mark type: PSE ⚫︎ Set Contents: ▲ Water-cooling vest body ▲ Battery 5,200mAh ▲ Ice Man Charge Bottle 5.0 (1,000ml) (Commercially available frozen plastic bottles can also be used as a substitute for the frozen bottle) ● Ice Drip Control: The world's first unique control system, a technology that realizes the ideal water-cooling clothing. Slim dedicated bottle for a comfortable back! Harness compatible! ● The popular water-cooling clothing series for 2025 is newly released with a type that allows you to use a harness while wearing it, using a dedicated slim charge bottle! ● It's thin, so you can lean back in a chair and it doesn't interfere with driving a car. ● Because cold water flows directly to the parts of the body, you can get a higher cooling effect compared to cooling with wind, especially in hot environments. ● The entrance of the charge bottle is a slide type, so you can easily take the charge bottle in and out. Also, it has a double water-stop structure with a smart zipper and slide lock to completely prevent water leakage. ● Hand washing is possible without removing the pump.