Introduction: DBF-1 type of life jacket with the requirements of SOLAS, IMO specification, with watertight, buoyancy and natural insulation features, with whistle whistle and life jackets, do not need to wear a life jacket. It will be connected together to protect the entire body, in addition to the face of the face, the navigation of ships, oil platforms and other offshore operations engineering. The product is approved and tested by the China Classification society.