Feature: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. Adjustable 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.How 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 intermittent use, the cooling vest can keep the body cool for about 4 to 7 hours (depending on the power capacity)Use tutorial:1. Water injection volume 500ml2. Insert the usb cable in the backpack into the power bank3. Put the power bank into the strap4. Put on the cooling clothes and adjust the tightness5. Start the power
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