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.
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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