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Life jacket is used for saving a life in emergency situations.
The survival time in cold water is much shorter than general disaster situations.
This life jacket is designed to be more safe, fast, comfortable and longer survival.
By using a ring, you form a round each other.
If you form a round, it will prevent hypothermia, carry away by tidal current, and rescue will be more easy.
Busan, South Korea
Sang won Park,