1. Polyester and TPU Materials: Made of premium polyester and TPU materials, this cooling vest provides a no toxic cooling solution that keeps clothes dry and functions well in humid environments.2. Efficient Cooling Technology: The water circulation cooling vest utilizes the power of water and ice to effectively lower your core temperature, making it suitable for both indoor and outdoor use.3. Designed for Comfort and Functionality: This ice vest is designed for comfort and functionality, offering a full range of motion with adjustable elasticity, suitable for both men and women.4. USB Powered and : 5V 1A or 5V 2A USB interface mobile power supply, with a 3.5L water pack capacity, this cool vest is safe, long lasting, easy to maintain, and provides lasting cooling relief.5. Perfect for Summer Outdoor Activities: Ideal for outdoor activities in the summer such as fishing, cycling, running, gardening, maintenance work, cleaning, and more.Spec:Item Type: Cooling VestMaterial: Polyester, TPUPurpose: This vest is a versatile and safety conscious cooling tool, perfect for people with heat sensitive conditions, those working in hot environments, or anyone looking to stay cool during outdoor activities like gardening or mowing. It is great for cooling off in any season.Power Supply: 5V 1A or 5V 2A USB interface mobile power supplyWater Pack Capacity: 3.5LWorking Time: Depends on the capacity of the mobile power bank. When the mobile power bank is 10000mAh (36wh), the working time is 36/5=7.2hCare Instructions: Hand wash with cold water, wind dry. Do not machine wash, dry clean, or iron.How to Use:Open the water bag cover, add water and ice (less than 1.8kg of ice), connect the power bank, wear the vest, adjust the tightness, turn on the switch and use.How to drain: Turn off the power, pour out the water in the water bag. The water in the cooling pipe needs to be connected to the power again to drain the