1. Polyester Material: This cooling vest adopts premium polyester material, which ensures good light resistance and great comfort.2. Water Circulation: This ice vest features TPU water circulation cooling sheet which ensures even cooling and prevent local undercooling.3. Tightness: The tightness of this body cooling vest can be easily adjusted, which is suitable for different body types.4. Self Suction Pump: This cool vest adopts self suction pump, you can run a 5 to 12V power supply without putting it in water.5. Widely 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.Spec:Item Type: Cooling VestMaterial: Polyester, TPUApplication: 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 CoolerMinimum Water Level Requirement: 500mlBack Bag Capacity: 3.5LContinuous 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 IronAbout 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 LightHow to Use:It can be turned off after 5 to 10 minutes of use when it is turned on, and it can be turned on again when it feels not cool enough. According to this