... a new type of waterproof and insulating life jacket, which is a life preserver suitable for people working on sea. Marine life jackets warm ... the buoyancy ≥ 7.5kgf, water can withstand an adult weight over 100 hours floating in the water will not reduce the ... : a new multi-layer super-Pu material Application: The life jackets for offshore fishing, flood, ships officers, water tourism, industrial ...