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C-balloon wouid like to solve the lifejacket storage problem. The life jacket usually takes lots space for storage.The C-balloon will be storedwithout air to save space.When user press the button it will be inflated.Subvert traditional o-shape is more convenient and rapid use of c-type along with fiuorescent strip conducive to night rescue recogn ition.The C-balloon also can be connect to the matrix array for stabilize also more comfortable in the sea.