New, unopened product. Retail price is 15,800 yen. A cool vest that circulates water to cool the body. Duration: 3.5 hours PROACT Water Cooling Vest Full Set Free Size, Navy, KDC-B01(NV) - Model Name: DIRECT COOL - Battery Capacity: 3350mAh - Compatible Bottle Size: Up to 650ml - Cooling Function: Circulates water for cooling - Modes: 3 modes - Brand: PRO-ACT 【Specifications】 ●Material: Outer fabric/Nylon ●Lining/Polyester ●Tank Material/TPU (Thermoplastic Polyurethane Elastomer) ●Cooling Parts/Aluminum, Polyurethane ●Cooling Hose/Silicone Rubber ●Size: Free Size ●Weight: Approximately 600g ●Color: Navy ●Quiet operation without motor noise or wind noise ●Battery with a program function to adjust cooling time ●Continuous operation for 20 seconds, pause for 45 seconds, then 20 seconds operation, pause for 90 seconds ●Set Contents: Vest body, dedicated lithium-ion battery 3.6V, 3,350mAh, USB charging cable (AC adapter sold separately)