Professional buoyancy vest specifically designed for maritime construction environments, made of densely woven 300D polyester oxford fabric combined with EPE high-density polyethylene foam buoyancy material providing buoyancy exceeding 9.5KG. The orange-blue design ensures high visibility during maritime operations, with shoulder-mounted prominent reflective patches enhancing identification. One-size design with multi-point adjustment system accommodates various worker body types, providing snug comfort. Lightweight structure ensures operational flexibility while maintaining safety. Widely applied in offshore oil and gas platform construction, offshore wind power installation, cross-sea bridge construction, and various professional maritime engineering projects, becoming critical equipment for ensuring maritime construction worker safety.