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This is a special design of life jackets, which can disperse the water flow rushing toward the lifeguard, thus reducing the difficulty of moving in flood.
The pattern of grain on the life jacket acts as a guide for water flow, it can disperse the water impact to the lifeguard and prevent spray. The streamlined configuration decreases the flow resistance to a certain extent.
In addition, the structure of big top and small bottom can keep the lifeguard head up from choking on water.
Xu Tianning; Guan Hongyue; Zhu Pengfei; Kong Ying