Cool water runs through the cooling hose, cooling the body. Cooling with cold water or frozen plastic bottles. Cooling vest with armpit access. 【Uses】 Workwear (cooler) 【Features】 ・Fill the tank on the back with cold water, charge with ice packs such as frozen plastic bottles, and cool the body with easy 3 steps by turning on the battery. ・The battery is stored in the front for easy operation. ・The tank on the back supports plastic bottles up to 650ml and can be easily taken out. #mayashop's products are here ⬅️ Size: F (Bust 95-115cm, Shoulder width 25cm, Length 41.5cm, M-3L compatible) Accessories: Timer battery 3350mAh x 1, MicroUSB charging cable x 1 Battery specifications: Height 97 x Width 64 x Depth 24mm, approx. 88g, charging approx. 2 hours, charge/discharge approx. 300 times Cooling UP mode: approx. 2.5 hours (continuous cold water circulation), approx. 7 hours (continuous operation possible), timer continuous operation Long-time use mode: approx. 3 hours (continuous cold water circulation), approx. 20 hours (continuous operation possible), timer 20 seconds operation - 45 seconds stop Longest time use mode: approx. 3.5 hours (continuous cold water circulation), approx. 25 hours (continuous operation possible), timer 20 seconds operation - 1 minute 30 seconds stop