1. The life vest should try to choose bright colors such as red and yellow, because once the wearer falls into the water, it will be easier for the rescuer to find you.
2. There should be a life-saving whistle in the life vest to let the drowning man call for help.
3. In order to find the drowning person easily in the sea, the fabric color of the lifejacket is used in bright color, and the reflection board is installed on the two shoulders of the life jacket, which should be noticed when choosing.