General Requirements
1.1 The quality of life jackets should be light and comfortable, with few knots and simple fasteners.
2. The size of the life jacket should be suitable for adults of all body types, including those who wear more or less clothing; Life jackets can only be worn on one side.
3. Lifejackets should have a bright and visible color on all surfaces that are helpful for detection, such as orange yellow
Each life jacket should be equipped with a reflective tape made of reverse reflective material with a minimum size of 400c3 above the calm waterline
4. Each life jacket should be equipped with a position light, and during normal use, the position light should be raised above the water surface to attach to the life jacket
There should be no negative impact.

5. Each life jacket should be equipped with a whistle. The length of the rope connecting the whistle should be sufficient for use, and it should be securely attached to the life jacket
Put it in the pocket, and when in use, the wearer should be able to remove or insert the whistle with either hand.
5. The metal parts and components on the numerical clothing should be resistant to seawater corrosion and have minimal impact on the magnetic compass on the ship.
6. The accessories of life jackets should be approved by the ship inspection agency.
7. The life jacket is valid for six years, with a comprehensive overhaul every three years and an annual measurement of the gas content in the cylinder.