Hot summer days don’t have to be hard to deal with. The Koojack is a fast cooling vest that keeps you comfortable at 25C. This semiconductor cooling vest cools down in 3 seconds. It has a lightweight design and uses a 5000mAh battery. It runs for up to 2 hours on battery. There is a temperature display above the switch to monitor the temperature inside.
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Demo Video for Koojack
Koojack is ideal for people who have to do hard work outdoors in hot conditions. It is also great for athletes. You can order it in 6 sizes from S to 3XL. This project is currently active on Kickstarter.
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