Item Type: Cooling Vest Material: Polyester, TPU Application: Exhibition Ground Staff, Outdoor Photography, Fishing, Golfing, Courier, Railway Workers, Construction Workers, Airport Ground Staff, Motorcycle Riding and Other Outdoor Work and Activities. Tip: Add Chilled Water to Make It Cooler Minimum Water Level Requirement: 500ml Back Bag Capacity: 3.5L Continuous Working Time: Depending on the Capacity of Mobile Power Supply, for Example, if the Mobile Power Supply is 10000mAh (36Wh), then the Power Supply Duration is 36/5=7.2 Hours (Working Time is Related to the Use Frequency, Power Bank Capacity, Human Body Temperature, Environmental Temperature, Ice Storage and Other Factors) Washing Suggestion: It is Recommended to Wash by Hand in Cold Water and Dry Naturally After Washing. Do Not Machine Wash, Dry or Iron About Storage: After Drying, if There is Water in the Cooling Sheet, It is Necessary to Drain the Water First, and then Dry in the Sun for Two Days, and then Store in a Dry Environment Away from Light1Polyester Material: This cooling vest adopts premium polyester material, which ensures good light resistance and great comfort. 2Water Circulation: This ice vest features TPU water circulation cooling sheet which ensures even cooling and prevent local undercooling. 3Adjustable Tightness: The tightness of this body cooling vest can be easily adjusted, which is suitable for different body types. 4Self Suction Pump: This cool vest adopts self suction pump, you can run a 5 to 12V power supply without putting it in water. 5Widely Used: This cooling vest is suitable for exhibition, outdoor photography, fishing, golfing, courier, railway workers, construction workers, airport ground staff, motorcycle riding and other outdoor work and activities. 1 xCooling Vest 1 x User Manual