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When floods, the temperatures will decrease significantly, lifebuoy cannot stop the physical contact of the victims with the cold flood, the weak body is without the guarantee of temperature, and the victims is likely to be infected. For this problem, we design a new lifebuoy, lifebuoy is combined with waterproof pants, so that people escape from the water without wetting the clothes at the same time to ensure the body temperature and isolate the bacteria, thus everyone can escape from flooding safely and healthily.